# A010937 (b-file synthesized from sequence entry)
0 1
1 21
2 210
3 1330
4 5985
5 20349
6 54264
7 116280
8 203490
9 293930
10 352716
11 352716
12 293930
13 203490
14 116280
15 54264
16 20349
17 5985
18 1330
19 210
20 21
21 1