A076740 - OEIS

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A076740

a(0)=0, a(1)=1, a(n)=2*a(n-1)^2-a(n-2)^2.

0, 1, 2, 7, 94, 17623, 621131422, 771608486480914039, 1190759312818733806192492198418844958, 2835815482129086304432303489823255992516794878843873643408264712776750007 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	EXAMPLE	`a(2)=21^2-0^2=2-0=2` `a(3)=22^2-1^2=8-1=7` `a(4)=2*7^2-2^2=98-4=94`
	PROG	`(PARI) a=vector(10); a[1]=0; a[2]=1; for (i=3, 10, a[i]=2*a[i-1]^2-a[i-2]^2); a`
	CROSSREFS	`Sequence in context: A096208 A123995 A056161 * A112290 A072059 A102344` `Adjacent sequences: A076737 A076738 A076739 * A076741 A076742 A076743`
	KEYWORD	`nonn`
	AUTHOR	`Jon Perry (perry(AT)globalnet.co.uk), Jun 19 2003`

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Last modified February 16 09:27 EST 2012. Contains 205904 sequences.