# A037540 (b-file synthesized from sequence entry)
1 1
2 9
3 64
4 449
5 3145
6 22016
7 154113
8 1078793
9 7551552
10 52860865
11 370026057
12 2590182400
13 18131276801
14 126918937609
15 888432563264
16 6219027942849
17 43533195599945
18 304732369199616
19 2133126584397313