# A296727 (b-file synthesized from sequence entry)
0 0
1 1
2 2
3 5
4 20
5 109
6 654
7 4353
8 34824
9 324441
10 3244410
11 34795485
12 417545820
13 5536151685
14 77506123590
15 1144330385625
16 18309286170000
17 315366695240625
18 5676600514331250
19 106667957800963125
20 2133359156019262500
21 45229212438054868125
22 995042673637207098750
23 22696937952367956440625