# A111365 (b-file synthesized from sequence entry) 0 1 1 1 2 8 3 43 4 239 5 1324 6 7337 7 40657 8 225296 9 1248451 10 6918143 11 38336068 12 212434769 13 1177182049 14 6523214552 15 36147618907 16 200307738191 17 1109981547676 18 6150830952953 19 34084099407793 20 188872989897824 21 1046617247712499