# A016277 (b-file synthesized from sequence entry)
0 1
1 13
2 123
3 1049
4 8603
5 69489
6 557971
7 4470073
8 35779755
9 286296065
10 2290543619
11 18324876297
12 146600596507
13 1172809538641
14 9382490625267
15 75059967983321
16 600479872875659
17 4803839370163617
18 38430716123046115