# A172031 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 3
5 30
6 15
7 70
8 35
9 210
10 105
11 2310
12 1155
13 10010
14 5005
15 30030
16 15015
17 510510
18 255255
19 3233230
20 1616615
21 1939938
22 969969
23 44618574
24 22309287
25 74364290
26 37182145
27 223092870
28 111546435
29 6469693230
30 3234846615
31 66853496710
32 33426748355
33 200560490130