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A190958 as a simple table

na(n)
00
11
22
3-6
4-32
5-4
6312
7664
8-1792
9-10224
10-2528
1197184
12219648
13-532544
14-3261568
15-1197696
1630220288
1772417536
18-157367808
19-1038910976
20-504143872
219380822016
2223803082752
23-46202054656
24-330434936832
25-198849327104
262906650714112
277801794699264

[0,1,2,-6,-32,-4,312,664,-1792,-10224,-2528,97184,
 219648,-532544,-3261568,-1197696,30220288,
 72417536,-157367808,-1038910976,-504143872,
 9380822016,23803082752,-46202054656,-330434936832,
 -198849327104,2906650714112,7801794699264]