# A352608 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 15
4 120
5 780
6 9744
7 92085
8 1589760
9 19983915
10 445344000
11 7053735150
12 194162549760
13 3735730993995
14 123152970608640
15 2803291544678625
16 108175188829962240
17 2855475766145702700
18 126726160086516695040
19 3818865908630429932275
20 192201344414226343526400