A161176 - OEIS

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A161176

4n^2-10n+107.

107, 101, 103, 113, 131, 157, 191, 233, 283, 341, 407, 481, 563, 653, 751, 857, 971, 1093, 1223, 1361, 1507, 1661, 1823, 1993, 2171, 2357, 2551, 2753, 2963, 3181, 3407, 3641, 3883, 4133, 4391, 4657, 4931, 5213, 5503, 5801, 6107 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	COMMENTS	`Northwest corner values of Ulam spiral with 101 at center.`
	LINKS	`Index entries for recurrences with constant coefficients`
	FORMULA	`a(n)=3a(n-1)-3a(n-2)+a(n-3). G.f.: -(107-220x+121x^2)/(x-1)^3. [R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 24 2009]`
	CROSSREFS	`Sequence in context: A160487 A178546 A096712 * A161372 A099652 A118774` `Adjacent sequences: A161173 A161174 A161175 * A161177 A161178 A161179`
	KEYWORD	`nonn,easy`
	AUTHOR	`Milton L. Brown (miltbrown(AT)earthlink.net), Jun 05 2009, Jul 21 2009`

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Last modified February 17 13:28 EST 2012. Contains 206031 sequences.