# A292029 (b-file synthesized from sequence entry) 2 1 3 6 4 40 5 200 6 1056 7 4928 8 23808 9 107136 10 494080 11 2173952 12 9744384 13 42225664 14 185679872 15 795770880 16 3451518976 17 14668955648 18 62970789888 19 265876668416 20 1132226150400 21 4755349831680 22 20120910954496 23 84141991264256 24 354160151101440 25 1475667296256000 26 6184144161734656