# A081922 (b-file synthesized from sequence entry)
0 1
1 4
2 17
3 76
4 361
5 1844
6 10321
7 64348
8 453329
9 3619684
10 32666161
11 329434604
12 3677682937
13 44901581716
14 595567550321
15 8505627039484
16 130307878338721
17 2126927187154628
18 36912563369550289
19 677277819029706124