# A356634 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 24
5 125
6 780
7 5670
8 47040
9 439110
10 4561200
11 52182900
12 651974400
13 8832874050
14 129001672800
15 2020822303500
16 33805804032000
17 601587281295000
18 11348960759136000
19 226275153994890000
20 4755046903326720000
21 105061084389756495000
22 2435176811445618240000