Expansion of (-1+x^3+x^6+x^9)/((1-x)*(2*x-1)*(x^2+1)*(x^2+x+1)*(x^4-x^2+1)).
1, 2, 4, 8, 16, 32, 62, 124, 248, 494, 988, 1976, 3952, 7904, 15808, 31616, 63232
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Thu Nov 19 17:19:12 CET 2009 [seqfan] detective work related to Creighton Dement's "Floretions"