# A349560 (b-file synthesized from sequence entry) 0 1 1 0 2 2 3 3 4 40 5 245 6 2976 7 35287 8 524560 9 8790777 10 165530800 11 3493679651 12 80812685064 13 2049413147509 14 56294089065592 15 1668771901644135 16 53057068616526496 17 1801519375618579313 18 65063987978980974048 19 2490449984485154892235 20 100716775979173952155480