# A307793 (b-file synthesized from sequence entry) 1 1 2 1 3 3 4 7 5 24 6 49 7 205 8 411 9 1668 10 5011 11 20095 12 40191 13 241372 14 482745 15 1931393 16 7725627 17 38629803 18 77259607 19 463562851 20 927125703 21 5562774334 22 22251097753 23 89004431205 24 178008862411 25 1424071142304 26 4272213426961 27 17088854190591 28 68355416767375 29 410132502535664 30 820265005071329