The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A079978 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A079978

Characteristic function of multiples of three.
(history; published version)

#197 by Michel Marcus at Mon Jan 06 05:33:35 EST 2025

STATUS

reviewed

approved

#196 by Joerg Arndt at Mon Jan 06 01:27:10 EST 2025

STATUS

proposed

reviewed

#195 by Michel Marcus at Sun Jan 05 17:05:56 EST 2025

STATUS

editing

proposed

#194 by Michel Marcus at Sun Jan 05 17:05:44 EST 2025

FORMULA

a(n) = A000217(n+1) mod 3. -_ _Christopher Adams_, Jan 05 2025

STATUS

proposed

editing

#193 by Christopher Adams at Sun Jan 05 16:59:48 EST 2025

STATUS

editing

proposed

#192 by Christopher Adams at Sun Jan 05 16:59:13 EST 2025

FORMULA

a(n) = A000217(n+1). - mod 3 _. -_Christopher Adams_, Jan 05 2025

#191 by Christopher Adams at Sun Jan 05 15:47:21 EST 2025

FORMULA

a(n) = A000217(n+1). - mod 3 Christopher Adams, Jan 05 2025

STATUS

approved

editing

#190 by Joerg Arndt at Thu Dec 14 05:26:05 EST 2023

STATUS

proposed

approved

#189 by Paolo P. Lava at Thu Dec 14 04:52:21 EST 2023

STATUS

editing

proposed

#188 by Paolo P. Lava at Thu Dec 14 04:52:18 EST 2023

FORMULA

a(n) = ceiling(cos(n*(2/3)*Pi)). - Paolo P. Lava, Aug 22 2006

a(n) = -((n^2 mod 3) - 1). - Paolo P. Lava, Oct 02 2006

STATUS

approved

editing