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Search: id:A081685
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A081685 A sum of decreasing powers. +0
3
1, 0, -2, 24, 382, 3480, 26398, 183624, 1217662, 7844280, 49595998, 309603624, 1915345342, 11771312280, 71987479198, 438579414024, 2664184199422, 16146411375480, 97676153291998, 590010215086824, 3559688013155902, 21455704981601880, 129219894496730398 (list; graph; listen)
OFFSET

0,3
COMMENT

Binomial transform of A081684

FORMULA

a(n)=6^n-5^n-4^n-3^n+3*2^n

G.f.:(-1-636*x^4+516*x^3-153*x^2+20*x)/((6*x-1)*(4*x-1)*(3*x-1)*(2*x-1)*(5*x-1)) [From Maksym Voznyy (voznyy(AT)mail.ru), Jul 27 2009]

CROSSREFS

Sequence in context: A119702 A126804 A090114 this_sequence A052670 A052736 A103904

Adjacent sequences: A081682 A081683 A081684 this_sequence A081686 A081687 A081688

KEYWORD

easy,sign

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Mar 30 2003

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

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