The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A166373 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A166373

Triangle read by rows for floor(j^2 / n) with n >= 2 and 1<=j<n.
(history; published version)

#7 by R. J. Mathar at Tue Jul 21 04:49:12 EDT 2015

STATUS

editing

approved

#6 by R. J. Mathar at Tue Jul 21 04:40:57 EDT 2015

NAME

Triangle read by rows for floor(j^2 / n) with n >= 2 and j = 1:<=j<n-1.

CROSSREFS

Cf. A166381 (column sums), A166375 (row sums).

STATUS

approved

editing

#5 by Charles R Greathouse IV at Mon May 13 01:49:10 EDT 2013

PROG

(PARI) T(n, j)=j^2\n \\ _Charles R Greathouse IV, _, Jan 16 2012

Discussion

Mon May 13

01:49

OEIS Server: https://oeis.org/edit/global/1914

#4 by Russ Cox at Fri Mar 30 17:34:11 EDT 2012

AUTHOR

_Christopher Hunt Gribble (chris.eveswell(AT)virgin.net), _, Oct 13 2009. Offset corrected Oct 18 2009.

Discussion

Fri Mar 30

17:34

OEIS Server: https://oeis.org/edit/global/159

#3 by Charles R Greathouse IV at Mon Jan 16 00:01:13 EST 2012

STATUS

editing

approved

#2 by Charles R Greathouse IV at Mon Jan 16 00:01:08 EST 2012

COMMENTS

Part of the triangle from which the sequence is constructed is shown below.

.....j..1..2..3..4..5..6..7..8..9.10.11.12.13.14

...n

...2....0

...3....0..1

...4....0..1..2

...5....0..0..1..3

...6....0..0..1..2..4

...7....0..0..1..2..3..5

...8....0..0..1..2..3..4..6

...9....0..0..1..1..2..4..5..7

..10....0..0..0..1..2..3..4..6..8

..11....0..0..0..1..2..3..4..5..7..9

..12....0..0..0..1..2..3..4..5..6..8.10

..13....0..0..0..1..1..2..3..4..6..7..9.11

..14....0..0..0..1..1..2..3..4..5..7..8.10.12

..15....0..0..0..1..1..2..3..4..5..6..8..9.11.13

EXAMPLE

Part of the triangle from which the sequence is constructed is shown below.

.....j..1..2..3..4..5..6..7..8..9.10.11.12.13.14

...n

...2....0

...3....0..1

...4....0..1..2

...5....0..0..1..3

...6....0..0..1..2..4

...7....0..0..1..2..3..5

...8....0..0..1..2..3..4..6

...9....0..0..1..1..2..4..5..7

..10....0..0..0..1..2..3..4..6..8

..11....0..0..0..1..2..3..4..5..7..9

..12....0..0..0..1..2..3..4..5..6..8.10

..13....0..0..0..1..1..2..3..4..6..7..9.11

..14....0..0..0..1..1..2..3..4..5..7..8.10.12

..15....0..0..0..1..1..2..3..4..5..6..8..9.11.13

PROG

(PARI) T(n, j)=j^2\n \\ Charles R Greathouse IV, Jan 16 2012

KEYWORD

nonn,easy,tabl

STATUS

approved

editing

#1 by N. J. A. Sloane at Tue Jun 01 03:00:00 EDT 2010

NAME

Triangle read by rows for floor(j^2 / n) with n >= 2 and j = 1:n-1.

DATA

0, 0, 1, 0, 1, 2, 0, 0, 1, 3, 0, 0, 1, 2, 4, 0, 0, 1, 2, 3, 5, 0, 0, 1, 2, 3, 4, 6, 0, 0, 1, 1, 2, 4, 5, 7, 0, 0, 0, 1, 2, 3, 4, 6, 8, 0, 0, 0, 1, 2, 3, 4, 5, 7, 9, 0, 0, 0, 1, 2, 3, 4, 5, 6, 8, 10, 0, 0, 0, 1, 1, 2, 3, 4, 6, 7, 9, 11, 0, 0, 0, 1, 1, 2, 3, 4, 5, 7, 8, 10, 12, 0, 0, 0, 1, 1, 2, 3, 4, 5, 6, 8, 9

OFFSET

2,6

COMMENTS

Part of the triangle from which the sequence is constructed is shown below.

.....j..1..2..3..4..5..6..7..8..9.10.11.12.13.14

...n

...2....0

...3....0..1

...4....0..1..2

...5....0..0..1..3

...6....0..0..1..2..4

...7....0..0..1..2..3..5

...8....0..0..1..2..3..4..6

...9....0..0..1..1..2..4..5..7

..10....0..0..0..1..2..3..4..6..8

..11....0..0..0..1..2..3..4..5..7..9

..12....0..0..0..1..2..3..4..5..6..8.10

..13....0..0..0..1..1..2..3..4..6..7..9.11

..14....0..0..0..1..1..2..3..4..5..7..8.10.12

..15....0..0..0..1..1..2..3..4..5..6..8..9.11.13

CROSSREFS

A165974 is contained in this sequence.

KEYWORD

nonn

AUTHOR

Christopher Hunt Gribble (chris.eveswell(AT)virgin.net), Oct 13 2009. Offset corrected Oct 18 2009.

STATUS

approved