# A144958 (b-file synthesized from sequence entry) 1 0 2 1 3 1 4 3 5 4 6 10 7 17 8 39 9 77 10 176 11 381 12 891 13 2057 14 4941 15 11915 16 29391 17 73058 18 184236 19 468330 20 1202349 21 3108760 22 8097518 23 21218776 24 55925742 25 148146312 26 394300662 27 1053929982 28 2828250002 29 7617271738 30 20584886435 31 55802753243