# A083421 (b-file synthesized from sequence entry)
0 1
1 8
2 46
3 242
4 1234
5 6218
6 31186
7 156122
8 780994
9 3905738
10 19530226
11 97654202
12 488277154
13 2441398058
14 12207014866
15 61035123482
16 305175715714
17 1525878775178
18 7629394269106
19 38146972131962
20 190734862232674