# A346292 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 4
4 36
5 576
6 17600
7 694800
8 35802144
9 2391438336
10 200018045952
11 20476348214400
12 2521840589347200
13 368057828019898368
14 62841061478699292672
15 12413136137144581203456
16 2809529229255558769612800
17 722458985698006017844838400
18 209487621780682072569567903744