# A354328 (b-file synthesized from sequence entry)
0 1
1 0
2 1
3 6
4 70
5 1080
6 21162
7 501060
8 13904152
9 442241856
10 15855648120
11 632501646480
12 27781645311216
13 1332152096109120
14 69237728070951888
15 3876953348374273440
16 232666700169003442560
17 14897335773169370787840
18 1013656610215024983681408