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A131575 First differences of A131572. 1
1, 1, 0, 2, 0, 4, 0, 8, 0, 16, 0, 32, 0, 64, 0, 128, 0, 256, 0, 512, 0, 1024, 0, 2048, 0, 4096, 0, 8192, 0, 16384, 0, 32768, 0, 65536, 0, 131072, 0, 262144, 0, 524288, 0, 1048576, 0, 2097152, 0, 4194304, 0, 8388608, 0 (list; graph; refs; listen; history; internal format)
OFFSET

0,4

FORMULA

a(n)=A131572(n+1)-A131572(n).

a(n)=A077957(n-1), n>0.

G.f.:(1+x-2x^2)/(1-2x^2)(From DELEHAM Philippe Oct 01 2011)

CROSSREFS

Sequence in context: A144775 A046666 A176296 * A077957 A077966 A021102

Adjacent sequences:  A131572 A131573 A131574 * A131576 A131577 A131578

KEYWORD

nonn,easy

AUTHOR

Paul Curtz (bpcrtz(AT)free.fr), Aug 28 2007

EXTENSIONS

Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 16 2008

More terms from DELEHAM Philippe,Oct 01 2011

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Last modified February 14 23:53 EST 2012. Contains 205689 sequences.