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Revision History for A065087 (Underlined text is an addition; strikethrough text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A065087

a(n) = A000166(n)*binomial(n+1,2).
(history; published version)

#37 by Michael De Vlieger at Sun Aug 18 14:10:42 EDT 2024

STATUS

reviewed

approved

#36 by Michel Marcus at Sun Aug 18 12:14:02 EDT 2024

STATUS

proposed

reviewed

#35 by Jean-François Alcover at Sun Aug 18 08:09:12 EDT 2024

STATUS

editing

proposed

#34 by Jean-François Alcover at Sun Aug 18 08:09:07 EDT 2024

MATHEMATICA

a[n_] := Subfactorial[n]*Binomial[n + 1, 2];

Table[a[n], {n, 0, 30}] (* Jean-François Alcover, Aug 18 2024 *)

STATUS

approved

editing

#33 by Alois P. Heinz at Mon Jun 25 15:49:35 EDT 2018

STATUS

proposed

approved

#32 by Ilya Gutkovskiy at Mon Jun 25 12:52:22 EDT 2018

STATUS

editing

proposed

#31 by Ilya Gutkovskiy at Mon Jun 25 12:24:27 EDT 2018

FORMULA

E.g.f.: exp(-x)*x^2*(3 - 2*x + x^2)/(2*(1 - x)^3). - Ilya Gutkovskiy, Jun 25 2018

STATUS

approved

editing

#30 by N. J. A. Sloane at Sun Jun 24 11:31:27 EDT 2018

STATUS

proposed

approved

#29 by Seiichi Manyama at Sun Jun 24 11:29:37 EDT 2018

STATUS

editing

proposed

#28 by Seiichi Manyama at Sun Jun 24 11:26:10 EDT 2018

CROSSREFS

Cf. A000166, A000240, A000387,, A305730.

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Last modified August 30 04:38 EDT 2024. Contains 375526 sequences. (Running on oeis4.)