

A144560


Ten times hexagonal numbers: 10*n*(2*n1).


1



0, 10, 60, 150, 280, 450, 660, 910, 1200, 1530, 1900, 2310, 2760, 3250, 3780, 4350, 4960, 5610, 6300, 7030, 7800, 8610, 9460, 10350, 11280, 12250, 13260, 14310, 15400, 16530, 17700, 18910, 20160, 21450, 22780, 24150, 25560, 27010
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OFFSET

0,2


COMMENTS

Sequence found by reading the line from 0, in the direction 0, 10,..., in the square spiral whose vertices are the generalized dodecagonal numbers A195162.  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) = 20n^2  10n = A000384(n)*10 = A002939(n)*5 = A152745(n)*2.
a(n) = a(n1)+40*n30 (with a(0)=0).  Vincenzo Librandi, Dec 14 2010


PROG

(PARI) a(n)=10*n*(2*n1) \\ Charles R Greathouse IV, Jun 17 2017


CROSSREFS

Cf. A000384, A002939, A152745, A152994.
Sequence in context: A066290 A065641 A121874 * A076160 A266732 A283727
Adjacent sequences: A144557 A144558 A144559 * A144561 A144562 A144563


KEYWORD

easy,nonn


AUTHOR

Omar E. Pol, Jan 01 2009


STATUS

approved



