# A216493 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 12
4 55
5 274
6 1444
7 7923
8 44803
9 259325
10 1529008
11 9151327
12 55454164
13 339543312
14 2097460255
15 13055579858
16 81803671623
17 515552408141
18 3265924761595
19 20784056808550
20 132812937949820
21 851847261569025
22 5482066256568375
23 35388168141000935
24 229081418808206500
25 1486757986305948780
26 9672120691595571320