A105841 - OEIS

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A105841

Numbers n such that n^2 = 31*(k^2) + 31*k + 1.

1, 309, 50469, 8242961, 17484559, 2855704251, 466414209771, 76178131891679, 161585265485281 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	FORMULA	`a(1)=1, a(2)=309, a(3)=50469, a(4)=8242961, a(5)=9241598a(1)+a(4), a(6)=9241598a(2)+a(3), a(7)=9241598a(3)+a(2), a(8)=9241598a(4)=a(1), then a(n)=9241598*a(n-4)-a(n-8)`
	CROSSREFS	`Cf. A105842.` `Sequence in context: A067730 A183627 A184544 * A127456 A114484 A051981` `Adjacent sequences: A105838 A105839 A105840 * A105842 A105843 A105844`
	KEYWORD	`nonn`
	AUTHOR	`Pierre CAMI (pierre-cami(AT)bbox.fr), Apr 22 2005`

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Last modified February 15 23:53 EST 2012. Contains 205860 sequences.