A157022 Expansion of (1+x+x^2+x^7+x^8+x^9)/(1+x^12).

1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, -1, -1, -1, 0, 0, 0, 0, -1, -1, -1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, -1, -1, -1, 0, 0, 0, 0, -1, -1, -1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, -1, -1, -1, 0, 0, 0, 0, -1, -1, -1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, -1, -1, -1, 0, 0, 0, 0, -1, -1, -1

Offset

0,1

Comments

a(n+1) is the Hankel transform of A157021.

Links

Table of n, a(n) for n=0..93.

Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).

Mathematica

CoefficientList[Series[(1+x+x^2+x^7+x^8+x^9)/(1+x^12), {x, 0, 120}], x] (* Harvey P. Dale, Mar 10 2019 *)

Crossrefs

Sequence in context: A014030 A014051 A016400 * A016362 A016415 A266659

Adjacent sequences: A157019 A157020 A157021 * A157023 A157024 A157025

Keyword

easy,sign

Author

Paul Barry, Feb 21 2009

Extensions

More terms from Max Alekseyev, Apr 22 2010

Status

approved