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Search: id:A081682
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A081682 A sum of decreasing powers. +0
2
1, 4, 16, 79, 634, 7099, 83746, 947419, 10193794, 105291979, 1054581826, 10323156859, 99334276354, 943521561259, 8873286384706, 82805541911899, 768050761613314, 7089438235180939, 65182761011000386, 597402284308532539 (list; graph; listen)
OFFSET

0,2

COMMENT

Binomial transform of A081681

FORMULA

a(n)=(9^n-8^n-7^n-6^n+4*5^n)/2

CROSSREFS

Cf. A081683.

Adjacent sequences: A081679 A081680 A081681 this_sequence A081683 A081684 A081685

Sequence in context: A000780 A002713 A009318 this_sequence A068788 A094013 A106568

KEYWORD

easy,nonn

AUTHOR

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

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Last modified October 11 09:12 EDT 2008. Contains 144832 sequences.


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