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A161176 4n^2-10n+107. 0
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)=3*a(n-1)-3*a(n-2)+a(n-3). G.f.: -(107-220*x+121*x^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.