# A274657 (b-file synthesized from sequence entry) 0 1 1 1 2 9 3 75 4 3675 5 59535 6 2401245 7 57972915 8 13043905875 9 418854310875 10 30241281245175 11 1212400457192925 12 213786613951685775 13 10278202593831046875 14 1070401384414690453125 15 60013837619516978071875 16 57673297952355815927071875 17 3694483615889146090857721875