# A047022 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 5
4 19
5 66
6 227
7 851
8 3164
9 11706
10 44397
11 168814
12 641641
13 2460264
14 9462675
15 36434340
16 140822588
17 545555490
18 2116273293
19 8226372157
20 32029990809
21 124856742546
22 487360876726
23 1904604296103
24 7450351584876
25 29172240231616