id:A087348 - OEIS Search Results

Search: id:A087348

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a(n) = 10n^2-6n+1.

+0
2

5, 29, 73, 137, 221, 325, 449, 593, 757, 941, 1145, 1369, 1613, 1877, 2161, 2465, 2789, 3133, 3497, 3881, 4285, 4709, 5153, 5617, 6101, 6605, 7129, 7673, 8237, 8821, 9425, 10049, 10693, 11357, 12041, 12745, 13469, 14213, 14977, 15761, 16565, 17389 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n)^2=A033579(n)^2+A033567(n)^2=(4*A000326(n))^2+(A033579(n)+A056220(n-1))^2`
	EXAMPLE	`a(3)=73 since 73^2=48^2+55^2=(4*12)^2+(48+7)^2`
	CROSSREFS	`Adjacent sequences: A087345 A087346 A087347 this_sequence A087349 A087350 A087351` `Sequence in context: A108928 A097812 A100559 this_sequence A154412 A050409 A111937`
	KEYWORD	`nonn`
	AUTHOR	`Charlie Marion (charliem(AT)bestweb.net), Oct 20 2003`
	EXTENSIONS	`More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Oct 22 2003`

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Last modified November 8 07:45 EST 2009. Contains 166143 sequences.

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