# A030937 (b-file synthesized from sequence entry)
1 1
2 2
3 6
4 26
5 130
6 782
7 5477
8 43823
9 394415
10 3944157
11 43385731
12 520628778
13 6768174123
14 94754437735
15 1421316566034
16 22741065056549
17 386598105961333
18 6958765907303999
19 132216552238775996
20 2644331044775519933