# A193620 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 22
4 132
5 875
6 6127
7 44580
8 333748
9 2553956
10 19887080
11 157066758
12 1255181598
13 10130663492
14 82461801961
15 676165571433
16 5580011570160
17 46309238031602
18 386256008451734
19 3236134144224075
20 27222318068596831
21 229828039356161276
22 1946773238298955438