The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A243201 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A243201

Odd octagonal numbers indexed by triangular numbers.
(history; published version)

#30 by Michael De Vlieger at Thu Apr 28 07:47:59 EDT 2022

STATUS

reviewed

approved

#29 by Michel Marcus at Thu Apr 28 02:22:08 EDT 2022

STATUS

proposed

reviewed

#28 by Stefano Spezia at Sun Apr 24 08:09:04 EDT 2022

STATUS

editing

proposed

#27 by Stefano Spezia at Sun Apr 24 08:08:57 EDT 2022

CROSSREFS

Cf. A000217, A000567, A002061, A003215, A005408, A014641, A022522, A140676, A187156.

#26 by Stefano Spezia at Sun Apr 24 08:08:36 EDT 2022

CROSSREFS

Cf. A000217, A000567, A002061, A003215, A005408, A014641, A022522, A140676, A187156.

STATUS

proposed

editing

#25 by Stefano Spezia at Sat Apr 16 11:35:15 EDT 2022

STATUS

editing

proposed

#24 by Stefano Spezia at Sat Apr 16 11:34:19 EDT 2022

FORMULA

a(n) = A081297(n, 5).

a(n) = A072024(n, 6).

a(n) = A219069(n + 1, n), n > 0.

Discussion

Sat Apr 16

11:35

Stefano Spezia: A lot of edits: some lines were duplicated between comments (now moved in crossrefs) and formula

#23 by Stefano Spezia at Sat Apr 16 11:32:59 EDT 2022

CROSSREFS

Cf. A000567, A002061, A003215, A005408, A014641, A022522, A140676, A187156.

#22 by Stefano Spezia at Sat Apr 16 11:20:22 EDT 2022

COMMENTS

Column 5 of A081297.

Column 6 of A072024.

Diagonal T(n + 1, n) of A219069, n > 0.

CROSSREFS

Column 5 of A081297.

Column 6 of A072024.

Diagonal T(n + 1, n) of A219069, n > 0.

#21 by Stefano Spezia at Sat Apr 16 11:17:38 EDT 2022

CROSSREFS

Cf. Row 5 of A059259 (coefficients of 1 + 4*n + 7*n^2 + 6*n^3 + 3*n^4 + 0*n^5 which is a formula for the within sequence).