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A157022
Expansion of (1+x+x^2+x^7+x^8+x^9)/(1+x^12).
1
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.
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
KEYWORD
easy,sign
AUTHOR
Paul Barry, Feb 21 2009
EXTENSIONS
More terms from Max Alekseyev, Apr 22 2010
STATUS
approved