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Search: id:A013709
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A013709 4^(2n+1). +0
3
4, 64, 1024, 16384, 262144, 4194304, 67108864, 1073741824, 17179869184, 274877906944, 4398046511104, 70368744177664, 1125899906842624, 18014398509481984, 288230376151711744, 4611686018427387904 (list; graph; listen)
OFFSET

0,1

LINKS

Tanya Khovanova, Recursive Sequences

FORMULA

a(n)=16*a(n-1), n>0 ; a(0)=4 . G.f.: 4/(1-16x). [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Nov 23 2008]

CROSSREFS

Sequence in context: A026301 A010042 A154021 this_sequence A139292 A152923 A085807

Adjacent sequences: A013706 A013707 A013708 this_sequence A013710 A013711 A013712

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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