# A115084 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 20
4 82
5 397
6 2186
7 13241
8 86578
9 603249
10 4440800
11 34313272
12 276904847
13 2324369733
14 20227700385
15 181987602305
16 1688734327673
17 16129293322211
18 158281104406067
19 1593383284029479
20 16431757177327175
21 173372313294822983