# A085867 (b-file synthesized from sequence entry)
1 2
2 12
3 105
4 1008
5 10080
6 100352
7 1000188
8 10001880
9 100018800
10 1000188000
11 10001880000
12 100018800000
13 1000188000000
14 10001880000000
15 100018800000000
16 1000188000000000
17 10001473779644928
18 100008061430022144