# A103980 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 45 4 35 5 4725 6 31185 7 945945 8 289575 9 310134825 10 3273645375 11 50414138775 12 5749711695 13 102776096548125 14 1494206326738125 15 92854250304440625 16 191898783962510625 17 107655217802968460625