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A303903
Expansion of (1 - x^2)*Product_{k>=3} (1 + x^Fibonacci(k)).
1
1, 0, 0, 1, -1, 1, 0, -1, 2, -1, 0, 1, -2, 2, 0, -1, 2, -2, 1, 0, -2, 3, -1, 0, 2, -3, 2, 0, -2, 3, -2, 0, 1, -3, 3, 0, -1, 3, -3, 2, 0, -3, 4, -2, 0, 2, -4, 3, 0, -2, 3, -3, 1, 0, -3, 4, -1, 0, 3, -4, 3, 0, -3, 5, -3, 0, 2, -5, 4, 0, -2, 4, -4, 2, 0, -4, 5, -2, 0, 3, -5, 3, 0, -3, 4, -3
OFFSET
0,9
COMMENTS
First differences of A000119.
MATHEMATICA
nmax = 85; CoefficientList[Series[(1 - x^2) Product[1 + x^Fibonacci[k], {k, 3, 21}], {x, 0, nmax}], x]
CROSSREFS
KEYWORD
sign
AUTHOR
Ilya Gutkovskiy, May 02 2018
STATUS
approved