id:A080952 - OEIS Search Results

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Sequence associated with the recurrence a(n)=2*a(n-1)+k(k+2)a(n-2).

+0
2

3, 21, 112, 504, 2016, 7392, 25344, 82368, 256256, 768768, 2236416, 6336512, 17547264, 47628288, 127008768, 333398016, 862912512, 2205220864, 5571084288, 13927710720, 34487664640, 84651540480, 206108098560, 498094571520 (list; graph; listen)

	OFFSET	`0,1`
	COMMENT	`The sixth column of A080928 is 2*A080952.`
	FORMULA	`G.f.: (1-x)(3-12x+28x^2-32x^3+16x^4)/(1-2x)^6`
	CROSSREFS	`Sequence in context: A054147 A043012 A122120 this_sequence A121140 A005057 A092634` `Adjacent sequences: A080949 A080950 A080951 this_sequence A080953 A080954 A080955`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Feb 26 2003`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research