# A198957 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 7
4 26
5 102
6 424
7 1827
8 8078
9 36466
10 167376
11 778718
12 3664164
13 17407068
14 83375616
15 402198915
16 1952296598
17 9528757098
18 46735576816
19 230227356906
20 1138609205372
21 5651170500612
22 28138939936704
23 140527262919342
24 703704207921932
25 3532664478314484
26 17775185122527776