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A131575 First differences of A131572. 2
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; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..48.

Index entries for linear recurrences with constant coefficients, signature (0, 2).

FORMULA

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

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

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

MATHEMATICA

Differences[LinearRecurrence[{0, 2}, {0, 1, 2}, 50]] (* or *) LinearRecurrence[ {0, 2}, {1, 1, 0}, 50] (* or *) Join[{1}, Riffle[2^Range[0, 30], 0]] (* Harvey P. Dale, Jul 10 2018 *)

CROSSREFS

Sequence in context: A276093 A176296 A194795 * A077957 A077966 A275670

Adjacent sequences:  A131572 A131573 A131574 * A131576 A131577 A131578

KEYWORD

nonn,easy

AUTHOR

Paul Curtz, Aug 28 2007

EXTENSIONS

Edited by R. J. Mathar, Jul 16 2008

More terms from Philippe Deléham, Oct 01 2011

STATUS

approved

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Last modified April 21 22:12 EDT 2019. Contains 322328 sequences. (Running on oeis4.)