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A368015 as a simple table

na(n)
01
1-1
2-3
35
481
529
6-4623
7-20035
8415041
94838909
10-46093743
11-1309934275
123230184801
13419574363389
142065056788337
15-154120122603715
16-2307971235744639
1759954627542249469
181959892188447337617
19-19474957767402204355
20-1658215397958862557279

[1,-1,-3,5,81,29,-4623,-20035,415041,4838909,
 -46093743,-1309934275,3230184801,419574363389,
 2065056788337,-154120122603715,-2307971235744639,
 59954627542249469,1959892188447337617,
 -19474957767402204355,-1658215397958862557279]