# A125331 (b-file synthesized from sequence entry) 0 1 1 21 2 135 3 693 4 4159 5 25291 6 157635 7 995659 8 6357119 9 40921479 10 265145505 11 1727138841 12 11300204035 13 74208972755 14 488874737353 15 3229363648333 16 21382430152111 17 141869013922279 18 942972599847861 19 6277675948529895