# A215516 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 -3
4 0
5 0
6 90
7 -63
8 0
9 -8880
10 22680
11 -49203
12 2118600
13 -12383280
14 60540480
15 -1131841623
16 10857974400
17 -87893114400
18 1246674306240
19 -15590737021923
20 175749917616000
21 -2471071936993440
22 35757593223327360
23 -502589340005210703
24 7719667979121014400