# A147078 (b-file synthesized from sequence entry)
1 1
2 1
3 1
4 1
5 1
6 1
7 3
8 9
9 21
10 61
11 210
12 735
13 3592
14 21789
15 146171
16 1140039
17 10204453
18 104577719
19 1275721875
20 18485616051
21 314997048326
22 6290384717771
23 146342301648076