id:A122021 - OEIS Search Results

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A122021

a(0) = 0, a(1) = 1, a(2) = 2; for n > 2, a(n) = a(n - 2) - (n - 1)*a(n - 3).

+0
4

0, 1, 2, 1, -1, -7, -6, -1, 43, 47, 52, -383, -465, -1007, 4514, 5503, 19619, -66721, -73932, -419863, 1193767, 1058777, 10010890, -25204097, -14340981, -265465457, 615761444, 107400049, 7783328783, -17133920383, 4668727362 (list; graph; listen)

	OFFSET	`1,3`
	MATHEMATICA	`a[0] = 0; a[1] = 1; a[2] = 2; a[n_] := a[n] = a[n - 2] - (n - 1)*a[n - 3] Table[a[n], {n, 0, 30}]`
	CROSSREFS	`Cf. A000898, A121966, A062267.` `Sequence in context: A005450 A039760 A156882 this_sequence A158200 A166345 A015110` `Adjacent sequences: A122018 A122019 A122020 this_sequence A122022 A122023 A122024`
	KEYWORD	`sign`
	AUTHOR	`Roger Bagula (rlbagulatftn(AT)yahoo.com), Sep 12 2006`
	EXTENSIONS	`Edited by N. J. A. Sloane (njas(AT)research.att.com), Sep 12 2006`

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.

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