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Search: id:A081891
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A081891 A sum of decreasing powers. +0
1
1, 4, 14, 64, 830, 14704, 228734, 3136144, 39450110, 468241264, 5338397054, 59140070224, 641540046590, 6850671429424, 72282030453374, 755587489260304, 7840735233590270, 80889167950995184, 830567232465613694 (list; graph; listen)
OFFSET

0,2

COMMENT

Binomial transform of A081690

FORMULA

a(n)=10^n-9^n-8^n-7^n+3*6^n

CROSSREFS

Sequence in context: A132079 A154407 A020041 this_sequence A119857 A126787 A129219

Adjacent sequences: A081888 A081889 A081890 this_sequence A081892 A081893 A081894

KEYWORD

easy,nonn

AUTHOR

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

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.


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