# A124470 (b-file synthesized from sequence entry) 0 1 1 2 2 5 3 16 4 63 5 288 6 1461 7 8013 8 46896 9 290916 10 1905162 11 13131193 12 95005565 13 719862361 14 5700083435 15 47075439047 16 404760508374 17 3617018777976 18 33539368302476 19 322222320833572 20 3202873385842352 21 32895350423011349