# A167551 (b-file synthesized from sequence entry)
1 1
2 2
3 7
4 26
5 115
6 596
7 3623
8 25462
9 203939
10 1836032
11 18361831
12 201984098
13 2423820227
14 31509694204
15 441135811847
16 6617037458606
17 105872600222083
18 1799834206605272
19 32397015728269319
20 615543298868687962