# A320254 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 16 4 125 5 1291 6 16177 7 241207 8 4153193 9 81082225 10 1770989921 11 42763506919 12 1131353484637 13 32541516492811 14 1011058416700529 15 33745374949198231 16 1204107124715441873 17 45741398365345761073 18 1843069565594762478145 19 78511973999963036415967 20 3525468554804288803649381