The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A355990 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A355990

a(n) = n! / (6 * floor(n/3)!).
(history; published version)

#17 by Michael De Vlieger at Fri Jul 22 10:36:30 EDT 2022

STATUS

proposed

approved

#16 by Seiichi Manyama at Fri Jul 22 10:22:57 EDT 2022

STATUS

editing

proposed

#15 by Seiichi Manyama at Fri Jul 22 10:16:25 EDT 2022

CROSSREFS

Column 3 of A355996.

#14 by Seiichi Manyama at Fri Jul 22 10:03:40 EDT 2022

CROSSREFS

Cf. A355988, A355989, A355991.,

STATUS

proposed

editing

#13 by Amiram Eldar at Fri Jul 22 09:35:53 EDT 2022

STATUS

editing

proposed

#12 by Amiram Eldar at Fri Jul 22 09:35:48 EDT 2022

MATHEMATICA

a[n_] := n!/(6 * Floor[n/3]!); Array[a, 22, 3] (* Amiram Eldar, Jul 22 2022 *)

STATUS

proposed

editing

#11 by Seiichi Manyama at Fri Jul 22 09:33:42 EDT 2022

STATUS

editing

proposed

#10 by Seiichi Manyama at Fri Jul 22 09:17:12 EDT 2022

FORMULA

a(n) = A355988(n)/6.

#9 by Seiichi Manyama at Fri Jul 22 09:14:17 EDT 2022

FORMULA

E.g.f.: (1 - x^3) * (exp(x^3) - 1)/( 6 * (1 - x)).

#8 by Seiichi Manyama at Fri Jul 22 09:13:14 EDT 2022

FORMULA

E.g.f.: (1 - x^3) * (exp(x^3) - 1)/( 6 * (1 - x)).

CROSSREFS

Cf. A355988, A355989, A355991.