# A151485 (b-file synthesized from sequence entry) 0 1 1 1 2 6 3 20 4 95 5 432 6 2100 7 10429 8 52990 9 273872 10 1435464 11 7610704 12 40747432 13 219972284 14 1196042952 15 6543872976 16 36000272857 17 199016494848 18 1104987607068 19 6159118520824 20 34451516940832 21 193323839813568 22 1087995843781768 23 6139413903894528 24 34728866786674200 25 196895381265884724