# A298988 (b-file synthesized from sequence entry)
0 1
1 -1
2 0
3 -18
4 208
5 -2400
6 36504
7 -663754
8 13808320
9 -324176418
10 8487126400
11 -245122390601
12 7741417124880
13 -265402847130421
14 9816338228638872
15 -389618889514254225
16 16518399076342421248
17 -745025763154442071130
18 35619835529954597786208
19 -1799459812004380374518790
20 95780758238408017088795600