# A001760 (b-file synthesized from sequence entry)
1 2
2 60
3 836
4 9576
5 103326
6 1106820
7 12062152
8 135391872
9 1575253690
10 19058801580
11 240134763948
12 3152151344088
13 43098592576694
14 613444153400340
15 9082400109162224
16 139747529003597424
17 2232451845925297938