# A119831 (b-file synthesized from sequence entry)
0 1
1 6
2 1
3 720
4 120
5 1
6 362880
7 60480
8 504
9 1
10 479001600
11 79833600
12 665280
13 1320
14 1
15 1307674368000
16 217945728000
17 1816214400
18 3603600
19 2730
20 1
21 6402373705728000
22 1067062284288000
23 8892185702400
24 17643225600
25 13366080
26 4896
27 1