# A118025 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 6 4 28 5 216 6 2864 7 66656 8 2760896 9 205824384 10 27886535424 11 6924055315968 12 3173107641551872 13 2700294145104025600 14 4289542333320782426112 15 12777557344991526923034624 16 71652489091220599890081005568