# A002704 (b-file synthesized from sequence entry) 0 2 1 26 2 938 3 42800 4 2130458 5 111557594 6 6041272682 7 335089258634 8 18922687509962 9 1083572842675610 10 62744027461625648 11 3666433604712457466 12 215879610645469496234 13 12792865816027823374874 14 762278349313657804740842 15 45638342462133835019322554