# A164964 (b-file synthesized from sequence entry) 0 1 1 26 2 650 3 16250 4 406250 5 10156250 6 253906250 7 6347656250 8 158691405925 9 3967285140000 10 99182128297200 11 2479553202360000 12 61988829932250000 13 1549720745137500000 14 38743018549218750000 15 968575461750000000000