# A001802 (b-file synthesized from sequence entry)
0 5
1 35
2 1260
3 4620
4 30030
5 90090
6 1021020
7 2771340
8 14549535
9 37182145
10 1487285800
11 3650610600
12 17644617900
13 42075627300
14 396713057400
15 925663800600
16 4281195077775
17 9821565178425
18 178970743251300
19 405039050516100
20 1822675727322450
21 4079321865912150