A173315 Inverse binomial transform of A131800.

1, 1, 2, -4, 0, 16, -48, 96, -160, 256, -448, 896, -1920, 4096, -8448, 16896, -33280, 65536, -130048, 260096, -522240, 1048576, -2101248, 4202496, -8396800, 16777216, -33538048, 67076096, -134184960, 268435456, -536936448, 1073872896, -2147614720, 4294967296

Offset

0,3

Links

Table of n, a(n) for n=0..33.

Index entries for linear recurrences with constant coefficients, signature (-4, -6, -4).

Formula

A131800(n) = A000111(n+2) mod 10.

a(n)= -4*a(n-1) -6*a(n-2) -4*a(n-3), n>3. G.f.: (5*x+12*x^2+14*x^3+1)/((2*x+1)*(2*x^2+2*x+1)).

Crossrefs

Cf. A106603.

Sequence in context: A196225 A127511 A321956 * A205975 A231915 A009170

Adjacent sequences: A173312 A173313 A173314 * A173316 A173317 A173318

Keyword

sign,easy

Author

Paul Curtz, Feb 16 2010

Extensions

Extended, keyword:sign added by R. J. Mathar, Feb 24 2010

Status

approved