id:A132596 - OEIS Search Results

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Sequence allows us to find X values of the equation: X(X + 1) - 6*Y^2 = 0.

+0
1

0, 2, 24, 242, 2400, 23762, 235224, 2328482, 23049600, 228167522, 2258625624, 22358088722 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(0)=0, a(1)=2 and a(n)=10a(n-1) - a(n-2) + 4.` `a(n)=-1/2+(1/4)[5+2sqrt(6)]^n+(1/4)[5-2*sqrt(6)]^n, with n>=0 - Paolo P. Lava (ppl(AT)spl.at), Jul 15 2008`
	CROSSREFS	`Cf. A007654.` `Sequence in context: A147538 A025131 A143407 this_sequence A099669 A019520 A061190` `Adjacent sequences: A132593 A132594 A132595 this_sequence A132597 A132598 A132599`
	KEYWORD	`nonn`
	AUTHOR	`Mohamed Bouhamida (bhmd95(AT)yahoo.fr), Nov 14 2007`

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Last modified December 4 15:51 EST 2008. Contains 151308 sequences.