A093969 - OEIS

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A093969

n*Pell(n-2).

0, 1, 0, 3, 8, 25, 72, 203, 560, 1521, 4080, 10835, 28536, 74633, 194040, 501915, 1292512, 3315425, 8474976, 21597091, 54884200, 139127289, 351877416, 888121195, 2237336592, 5626467025, 14126832720, 35416929267, 88670846936 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	COMMENTS	`The signed version (-1)^(n+1)nPell(n-2) is the second inverse binomial transform of A093967.`
	FORMULA	`G.f.: x(1-4x+5x^2)/(1-2x-x^2)^2; a(n)=n(1+sqrt(2))^n(3sqrt(2)/4-1)-n(1-sqrt(2))^n(3sqrt(2)/4+1).`
	CROSSREFS	`Cf. A000129.` `Sequence in context: A018789 A203413 A141799 * A006177 A148788 A022553` `Adjacent sequences: A093966 A093967 A093968 * A093970 A093971 A093972`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Apr 21 2004`

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Last modified February 13 23:23 EST 2012. Contains 205567 sequences.