A154617 Eleven times hexagonal numbers: 11*n*(2*n-1).

0, 11, 66, 165, 308, 495, 726, 1001, 1320, 1683, 2090, 2541, 3036, 3575, 4158, 4785, 5456, 6171, 6930, 7733, 8580, 9471, 10406, 11385, 12408, 13475, 14586, 15741, 16940, 18183, 19470, 20801, 22176, 23595, 25058, 26565, 28116, 29711

Offset

0,2

Comments

Sequence found by reading the line from 0, in the direction 0, 11,..., in the square spiral whose vertices are the generalized tridecagonal numbers A195313. - Omar E. Pol, Sep 18 2011

Links

Ivan Panchenko, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (3,-3,1).

Formula

a(n) = 22*n^2 - 11*n = A000384(n)*11.

a(n) = a(n-1)+44*n-33 (With a(0)=0). - Vincenzo Librandi, Dec 15 2010

Prog

(PARI) a(n)=11*n*(2*n-1) \\ Charles R Greathouse IV, Jun 17 2017

Crossrefs

Cf. A000384, A002939, A094159, A152745, A153781.

Sequence in context: A126479 A260151 A139611 * A297751 A063842 A331715

Adjacent sequences: A154614 A154615 A154616 * A154618 A154619 A154620

Keyword

easy,nonn

Author

Omar E. Pol, Jan 13 2009

Status

approved