# A370699 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 5
4 20
5 100
6 610
7 4270
8 34160
9 307160
10 3071600
11 33787600
12 405466600
13 5271065800
14 73794921200
15 1106922416600
16 17710758665600
17 301082897315200
18 5419492342264000
19 102970354503016000
20 2059407090060320000
21 43247548855054544000
22 951446074811199968000