# A165657 (b-file synthesized from sequence entry)
1 2
2 3
3 15
4 105
5 385
6 5005
7 17017
8 323323
9 1062347
10 30808063
11 434113615
12 35336848261
13 1448810778701
14 33545541876077
15 266186053068611
16 5426100312552455
17 9156001667401012567
18 42962777054727828199