OFFSET
0,4
COMMENTS
a(n+1) is the Hankel transform of A188476.
LINKS
Index entries for linear recurrences with constant coefficients, signature (0,0,0,-3,0,0,0,-3,0,0,0,-1).
MATHEMATICA
CoefficientList[Series[(1+x+x^2)(1-8x^3-14x^4+8x^7+x^8)/(1+x^4)^3, {x, 0, 50}], x] (* or *) LinearRecurrence[{0, 0, 0, -3, 0, 0, 0, -3, 0, 0, 0, -1}, {1, 1, 1, -8, -25, -25, -17, 32, 81, 81, 49, -72}, 50] (* Harvey P. Dale, May 29 2021 *)
CROSSREFS
KEYWORD
sign,easy
AUTHOR
Paul Barry, Apr 01 2011
STATUS
approved