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A361791 as a simple table

na(n)
01
12
2-4
3-10
430
572
6-238
7-580
81970
94910
10-16734
11-42750
12144600
13379000
14-1264700
15-3402480
1611160730
1730828070
18-99168820
19-281279030
20885931600
212580541580
22-7948885910
23-23779051760
2471572652480
25219906488302
26-646332447086
27-2039738985238
285850898295170

[1,2,-4,-10,30,72,-238,-580,1970,4910,-16734,
 -42750,144600,379000,-1264700,-3402480,11160730,
 30828070,-99168820,-281279030,885931600,
 2580541580,-7948885910,-23779051760,71572652480,
 219906488302,-646332447086,-2039738985238,
 5850898295170]