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A135706 n(5n-3). 4
0, 2, 14, 36, 68, 110, 162, 224, 296, 378, 470, 572, 684, 806, 938, 1080, 1232, 1394, 1566, 1748, 1940, 2142, 2354, 2576, 2808, 3050, 3302, 3564, 3836, 4118, 4410, 4712, 5024, 5346, 5678, 6020, 6372, 6734, 7106, 7488, 7880, 8282, 8694, 9116, 9548, 9990, 10442 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

COMMENTS

Twice heptagonal numbers. - Omar E. Pol (info(AT)polprimos.com), May 14 2008

REFERENCES

L. Hogben, Choice and Chance by Cardpack and Chessboard. Vol. 1, Chanticleer Press, NY, 1950, p. 36.

LINKS

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

FORMULA

Binomial transform of [2, 12, 10, 0, 0, 0,...] - Gary W. Adamson (qntmpkt(AT)yahoo.com), Mar 05 2008

a(n)=a(n-1)+10*n-8 (with a(0)=0) [From Vincenzo Librandi, Nov 24 2010]

MATHEMATICA

s=0; lst={s}; Do[s+=n; AppendTo[lst, s], {n, 2, 6!, 10}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Apr 02 2009]

CROSSREFS

a(n)=A000566(n)*2. - Omar E. Pol (info(AT)polprimos.com), May 14 2008

Sequence in context: A128126 A134647 A004117 * A091520 A108597 A062548

Adjacent sequences:  A135703 A135704 A135705 * A135707 A135708 A135709

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Mar 04 2008, Mar 05 2008

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Last modified February 15 23:53 EST 2012. Contains 205860 sequences.