OFFSET
0,1
COMMENTS
a(n+1) is the Hankel transform of A157021.
LINKS
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
KEYWORD
easy,sign
AUTHOR
Paul Barry, Feb 21 2009
EXTENSIONS
More terms from Max Alekseyev, Apr 22 2010
STATUS
approved