A098706 - OEIS

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A098706

a(n)=2*A076218(n); alternatively, a(0)=0, a(1)=2; for n>1, a(n)=2*A001653(n-2)*A001653(n-1).

0, 2, 10, 290, 9802, 332930, 11309770, 384199202, 13051463050, 443365544450, 15061377048202, 511643454094370, 17380816062160330, 590436102659356802, 20057446674355970890, 681362750825443653410, 23146276081390728245002 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	FORMULA	`For n>1, a(n)=A002315(n-2)*A002315(n-1)+3. For n>0, a(n)=(A001542(n-1)-1)^2+(A001542(n-1)-1)^2.`
	EXAMPLE	`a(3)=2529=2*145`
	CROSSREFS	`Sequence in context: A003047 A028580 A171873 * A143249 A161181 A073834` `Adjacent sequences: A098703 A098704 A098705 * A098707 A098708 A098709`
	KEYWORD	`nonn`
	AUTHOR	`Charlie Marion (charliemath(AT)optonline.net), Oct 28 2004`
	EXTENSIONS	`More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 10 2004`

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Last modified February 16 17:48 EST 2012. Contains 205939 sequences.