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A292778 INVERT transform of double factorials. 4
1, 1, 3, 8, 25, 73, 234, 717, 2357, 7480, 25289, 82837, 289518, 980017, 3566993, 12526980, 47916421, 175536777, 712276698, 2736099789, 11863097885, 47932689416, 222692658177, 946323358837, 4700880455462, 20946375415505, 110626016074953, 514550968010964 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..807

MAPLE

a:= proc(n) option remember; `if`(n=0, 1,

      add(doublefactorial(j)*a(n-j), j=1..n))

    end:

seq(a(n), n=0..30);

CROSSREFS

Cf. A006882, A051296.

Sequence in context: A213439 A006177 A148788 * A022553 A292884 A148789

Adjacent sequences:  A292775 A292776 A292777 * A292779 A292780 A292781

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Sep 22 2017

STATUS

approved

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Last modified November 17 08:17 EST 2018. Contains 317275 sequences. (Running on oeis4.)