# A045501 (b-file synthesized from sequence entry)
1 1
2 1
3 4
4 14
5 54
6 233
7 1101
8 5625
9 30846
10 180474
11 1120666
12 7352471
13 50772653
14 367819093
15 2787354668
16 22039186530
17 181408823710
18 1551307538185
19 13756835638385
20 126298933271289
21 1198630386463990
22 11742905240821910