A105845 - OEIS

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A105845

Numbers n such that n^2 = 41*(k^2) + 41*k + 1.

1, 4511, 8609, 18486079, 35279681, 75755947231, 144576124129, 310447853266559, 592472921400961 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	FORMULA	`Define a(1)=1, a(2)=4511, a(3)=4098a(1)+a(2), a(4)=4098a(2)+a(1), then a(n)=4098*a(n-2)-a(n-4)`
	CROSSREFS	`Cf. A105846.` `Sequence in context: A184465 A144490 A023684 * A107543 A104845 A138731` `Adjacent sequences: A105842 A105843 A105844 * A105846 A105847 A105848`
	KEYWORD	`nonn`
	AUTHOR	`Pierre CAMI (pierre-cami(AT)bbox.fr), Apr 22 2005`

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Last modified February 17 06:27 EST 2012. Contains 205998 sequences.