# A050185 (b-file synthesized from sequence entry) 0 0 1 1 2 5 3 22 4 91 5 364 6 1428 7 5537 8 21318 9 81719 10 312455 11 1193010 12 4552275 13 17368680 14 66284554 15 253086480 16 966955410 17 3697182450 18 14147884842 19 54185826156 20 207712333598 21 796937116661 22 3060338457400 23 11762344331920