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Search: id:A013780
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A013780 4^(4n+1). +0
2
4, 1024, 262144, 67108864, 17179869184, 4398046511104, 1125899906842624, 288230376151711744, 73786976294838206464, 18889465931478580854784, 4835703278458516698824704, 1237940039285380274899124224 (list; graph; listen)
OFFSET

0,1

LINKS

Tanya Khovanova, Recursive Sequences

FORMULA

a(n)=256*a(n-1), n>0 ; a(0)=4 . G.f.: 4/(1-256*x). [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Nov 27 2008]

CROSSREFS

Sequence in context: A087365 A024059 A069920 this_sequence A139300 A004804 A110499

Adjacent sequences: A013777 A013778 A013779 this_sequence A013781 A013782 A013783

KEYWORD

nonn,new

AUTHOR

njas

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Last modified November 30 22:12 EST 2008. Contains 150989 sequences.


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