Expansion of (-1-3*x+x^2)/((1-x)*(x+1)*(x^2+2*x-1)); a Pellian-related sequence.
1, 5, 11, 30, 71, 175, 421, 1020, 2461, 5945, 14351, 34650, 83651, 201955, 487561
1 seqfan posts
Thu Nov 19 17:19:12 CET 2009 [seqfan] detective work related to Creighton Dement's "Floretions"