# A003017 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 3 4 28 5 605 6 9366 7 116767 8 1310408 9 15812505 10 263924650 11 6018875291 12 148630870092 13 3548481410773 14 82543469312318 15 2000101425252855 16 54347539111582096 17 1678367049470539697 18 56020955060945897298