G.f. (x^2+x+1)*(2*x^2+2*x+1)*(x-1)^2/((1-x^2-2*x^3)*(x^4+1)).
1, 1, 1, 0, 1, 1, 3, 6, 7, 13, 17, 24, 41, 57, 91, 142, 207, 325, 489, 736, 1137, 1713
1 seqfan posts
Thu Nov 19 17:19:12 CET 2009 [seqfan] detective work related to Creighton Dement's "Floretions"