# A120917 (b-file synthesized from sequence entry) 0 1 1 4 2 32 3 212 4 1504 5 10848 6 79696 7 596160 8 4520000 9 34673940 10 268538048 11 2096374656 12 16475970896 13 130234435648 14 1034568731408 15 8254368150320 16 66112337392256 17 531345216883584 18 4283682906179728 19 34632004320564416