# A052627 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 0
4 0
5 120
6 720
7 5040
8 40320
9 362880
10 7257600
11 119750400
12 1916006400
13 31135104000
14 523069747200
15 10461394944000
16 230150688768000
17 5335311421440000
18 128047474114560000
19 3162772610629632000