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A048980 as a simple table

na(n)
01
11
20
3-6
4-36
5-196
6-724
77512
8366838
911928316
10421130508
1114598816402
12584642184936
1325314953837836
141128885572358548
1554492272309366314
162950485568862138250
17213151926413154110951

[1,1,0,-6,-36,-196,-724,7512,366838,11928316,
 421130508,14598816402,584642184936,25314953837836,
 1128885572358548,54492272309366314,
 2950485568862138250,213151926413154110951]