# A237623 (b-file synthesized from sequence entry) 1 0 2 0 3 0 4 0 5 0 6 1 7 2 8 6 9 14 10 30 11 62 12 129 13 252 14 499 15 984 16 1884 17 3624 18 7025 19 13358 20 25694 21 49316