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Search: id:A155543
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A155543 a(n)=2*A081294(n). +0
2
2, 4, 16, 64, 256, 1024, 4096, 16384, 65536, 262144, 1048576, 4194304, 16777216, 67108864, 268435456, 1073741824, 4294967296, 17179869184, 68719476736, 274877906944, 1099511627776, 4398046511104, 17592186044416, 70368744177664 (list; graph; listen)
OFFSET

0,1

FORMULA

a(n)=A000302(n), n>0.

G.f.: 2*(1-2*x)/(1-4*x). [R. J. Mathar, Jul 23 2009]

Conjecture: a(n)=A090129(2n+2).

CROSSREFS

Sequence in context: A127588 A092585 A106186 this_sequence A151371 A001900 A113247

Adjacent sequences: A155540 A155541 A155542 this_sequence A155544 A155545 A155546

KEYWORD

nonn,easy

AUTHOR

Paul Curtz (bpcrtz(AT)free.fr), Jan 24 2009

EXTENSIONS

Edited and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 23 2009

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.


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