# A130683 (b-file synthesized from sequence entry)
0 4
1 16
2 96
3 768
4 7680
5 92160
6 1290240
7 20643840
8 371589120
9 7431782400
10 163499212800
11 3923981107200
12 102023508787200
13 2856658246041600
14 85699747381248000
15 2742391916199936000
16 93241325150797824000
17 3356687705428721664000
18 127554132806291423232000