# A007823 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 14
4 45
5 186
6 945
7 5778
8 44037
9 403470
10 4344877
11 56072378
12 793804721
13 12734185106
14 229632768005
15 4628786367502
16 105803768420397
17 2626282179198138
18 71539181027191729
19 2076395667668755090
20 65704452165048754181