id:A122022 - OEIS Search Results

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A122022

a(0) = 0, a(1) = 1, a(2) = 2, a(3) = 1; for n > 3, a(n) = a(n - 1) - (n - 1)*a(n - 4).

+0
4

0, 1, 2, 1, 1, -3, -13, -19, -26, -2, 115, 305, 591, 615, -880, -5150, -14015, -23855, -8895, 83805, 350090, 827190, 1013985, -829725, -8881795, -28734355, -54083980, -32511130, 207297335, 1011859275, 2580294695 (list; graph; listen)

	OFFSET	`1,3`
	MATHEMATICA	`a[0] = 0; a[1] = 1; a[2] = 2; a[3] = 1; a[n_] := a[n] = a[n - 1] - (n - 1)*a[n - 4] Table[a[n], {n, 0, 30}]`
	CROSSREFS	`Cf. A000898, A121966, A062267.` `Sequence in context: A066013 A014521 A084389 this_sequence A134357 A049258 A078076` `Adjacent sequences: A122019 A122020 A122021 this_sequence A122023 A122024 A122025`
	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 20:09 EST 2009. Contains 167514 sequences.

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