# A191997 (b-file synthesized from sequence entry) 2 1 3 2 4 32 5 128 6 512 7 8192 8 2097152 9 226492416 10 301989888 11 536870912 12 32212254720 13 8349416423424 14 4453022092492800 15 1122161567308185600 16 2294196982052290560 17 12235717237612216320 18 16314289650149621760 19 58731442740538638336000 20 51166832915557261718323200