# A349088 (b-file synthesized from sequence entry) 0 0 1 1 2 2 3 6 4 25 5 125 6 750 7 5251 8 42008 9 378072 10 3780721 11 41587931 12 499055172 13 6487717237 14 90828041318 15 1362420619770 16 21798729916321 17 370578408577457 18 6670411354394226 19 126737815733490295 20 2534756314669805900 21 53229882608065923900 22 1171057417377450325801