# A351274 (b-file synthesized from sequence entry) 0 1 1 2 2 14 3 172 4 2964 5 65848 6 1789688 7 57521280 8 2133964352 9 89744964288 10 4219022123328 11 219246630903936 12 12479659844383104 13 772174659456713472 14 51603153976362554112 15 3704166182571098222592 16 284239227254465994240000 17 23218955083323248158556160