# A030897 (b-file synthesized from sequence entry)
1 1
2 2
3 7
4 28
5 143
6 858
7 6012
8 48101
9 432915
10 4329155
11 47620715
12 571448591
13 7428831692
14 104003643691
15 1560054655379
16 24960874486078
17 424334866263326
18 7638027592739873
19 145122524262057596
20 2902450485241151923