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A016747 (2*n)^7. 2
0, 128, 16384, 279936, 2097152, 10000000, 35831808, 105413504, 268435456, 612220032, 1280000000, 2494357888, 4586471424, 8031810176, 13492928512, 21870000000, 34359738368, 52523350144, 78364164096 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..10000

FORMULA

O.g.f.: 128*x*(1+120*x+1191*x^2+2416*x^3+1191*x^4+120*x^5+x^6)/(1-x)^8 - R. J. Mathar, May 07 2008

MATHEMATICA

(2*Range[0, 20])^7  [From Harvey P. Dale, Jan. 17, 2011]

PROG

(MAGMA) [(2*n)^7: n in [0..30]]; // Vincenzo Librandi, Sep 05 2011

CROSSREFS

Sequence in context: A001661 A184760 A093532 * A189269 A189622 A189694

Adjacent sequences:  A016744 A016745 A016746 * A016748 A016749 A016750

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 14 14:07 EST 2012. Contains 205623 sequences.