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Search: id:A083223
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A083223 (5*6^n+(-6)^n)/6. +0
3
1, 4, 36, 144, 1296, 5184, 46656, 186624, 1679616, 6718464, 60466176, 241864704, 2176782336, 8707129344, 78364164096, 313456656384, 2821109907456, 11284439629824, 101559956668416, 406239826673664, 3656158440062976 (list; graph; listen)
OFFSET

0,2

FORMULA

a(n)=(5*6^n+(-6)^n)/6 G.f. (1+4x)/((1+6x)(1-6x)) E.g.f. (5exp(6x)+exp(-6x))/6

CROSSREFS

Cf. A083222, A083224.

Sequence in context: A060783 A125756 A035287 this_sequence A102263 A103931 A068589

Adjacent sequences: A083220 A083221 A083222 this_sequence A083224 A083225 A083226

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Apr 23 2003

page 1

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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