# A323491 (b-file synthesized from sequence entry)
0 1
1 2
2 24
3 720
4 4480
5 3628800
6 68428800
7 118609920
8 20922789888000
9 6402373705728000
10 115852476579840000
11 1124000727777607680000
12 1909072005333044428800
13 1148978521728221184000000
14 12195533784468554420060160000
15 53050571962438211727261696000000
16 7973661725263440308097515520000000