# A075512 (b-file synthesized from sequence entry) 0 1 1 56 2 1848 3 47040 4 1023792 5 20076672 6 365787136 7 6314147840 8 104637781248 9 1680323893248 10 26325099300864 11 404403166003200 12 6115019304300544 13 91287994741981184 14 1348582723009708032