# A059228 (b-file synthesized from sequence entry) 0 1 1 1 2 6 3 34 4 204 5 1290 6 8486 7 57512 8 398882 9 2817790 10 20205084 11 146685686 12 1076065002 13 7964304176 14 59400014606 15 445991850330 16 3368359327020 17 25572325390546 18 195046637975486 19 1493883225366776 20 11484930879057370 21 88597575768631238