# A013113 (b-file synthesized from sequence entry) 0 1 1 4 2 56 3 1990 4 130280 5 13814650 6 2137954100 7 457685029750 8 128915903246000 9 46370152422675250 10 20689120752785127500 11 11232151174947132868750 12 7281395066161326989645000 13 5560840304175437693730906250