A137329 a(n)=-4a(n-4).

0, 2, 3, 1, 0, -8, -12, -4, 0, 32, 48, 16, 0, -128, -192, -64, 0, 512, 768, 256, 0, -2048, -3072, -1024, 0, 8192, 12288, 4096, 0, -32768, -49152, -16384, 0, 131072, 196608, 65536, 0, -524288, -786432, -262144, 0, 2097152, 3145728, 1048576, 0, -8388608, -12582912, -4194304, 0, 33554432, 50331648

Offset

0,2

Links

Table of n, a(n) for n=0..50.

Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, -4).

Formula

O.g.f.: x(x+2)(1+x)/((1-2x+2x^2)(1+2x+2x^2)) - R. J. Mathar, May 23 2008

Mathematica

LinearRecurrence[{0, 0, 0, -4}, {0, 2, 3, 1}, 60] (* Harvey P. Dale, Nov 29 2023 *)

Crossrefs

Sequence in context: A344172 A121434 A296455 * A265604 A171996 A175669

Adjacent sequences: A137326 A137327 A137328 * A137330 A137331 A137332

Keyword

sign

Author

Paul Curtz, Apr 20 2008

Extensions

More terms from R. J. Mathar, May 23 2008

Status

approved