# 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