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A066771 as a simple table

na(n)
01
13
2-7
3-117
4-527
5-237
611753
776443
8164833
9-922077
10-9653287
11-34867797
1232125393
131064447283
145583548873
156890111163
16-98248054847
17-761741108157
18-2114245277767
196358056037323
2091004468168113
21387075408075603
2247340744250793
23-9392840736385317

[1,3,-7,-117,-527,-237,11753,76443,164833,-922077,
 -9653287,-34867797,32125393,1064447283,5583548873,
 6890111163,-98248054847,-761741108157,
 -2114245277767,6358056037323,91004468168113,
 387075408075603,47340744250793,-9392840736385317]