# A193763 (b-file synthesized from sequence entry) 0 1 1 2 2 6 3 22 4 94 5 462 6 2606 7 16862 8 124782 9 1048990 10 9921550 11 104447550 12 1211190638 13 15329157278 14 210093682254 15 3097760346238 16 48869022535726 17 821007386273118 18 14630266558195214 19 275575669958063678 20 5469996402416702958 21 114107289124208861470