# A274760 (b-file synthesized from sequence entry) 0 1 1 1 2 10 3 478 4 68248 5 21809656 6 13107532816 7 13244650672240 8 20818058883902848 9 48069880140604832128 10 156044927762422185270016 11 687740710497308621254625536 12 4000181720339888446834235653120 13 29991260979682976913756629498334208