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A118183 as a simple table

na(n)
01
1-1
22
3-10
4134
5-4942
6505682
7-142838074
8108933186230
9-210663798566302
10812745803173573538
116022271614633142122646
12-2489044042602910169970590746
13996768343710992528631250678460690
14-928936693384587466168289179772677376782

[1,-1,2,-10,134,-4942,505682,-142838074,
 108933186230,-210663798566302,812745803173573538,
 6022271614633142122646,
 -2489044042602910169970590746,
 996768343710992528631250678460690,
 -928936693384587466168289179772677376782]