# A029889 (b-file synthesized from sequence entry) 0 1 1 2 2 5 3 14 4 43 5 140 6 476 7 1664 8 5939 9 21518 10 78876 11 291784 12 1087441 13 4077662 14 15369327 15 58184110 16 221104527 17 842990294 18 3223339023