# A165222 (b-file synthesized from sequence entry)
0 34
1 99
2 325
3 1161
4 4369
5 16929
6 66625
7 264321
8 1052929
9 4203009
10 16794625
11 67143681
12 268505089
13 1073881089
14 4295245825
15 17180426241
16 68720590849
17 274880135169
18 1099516084225
19 4398055424001
20 17592203870209
21 70368779829249