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A024242 as a simple table

na(n)
00
11
2-2
399
4-2244
5182917
6-13166918
71774050663
8-260505887880
954800178181129
10-13318656715497866
114113991096987284843
12-1477277623649109678924
13635278235733490892072077
14-314450515401786039971942606

[0,1,-2,99,-2244,182917,-13166918,1774050663,
 -260505887880,54800178181129,-13318656715497866,
 4113991096987284843,-1477277623649109678924,
 635278235733490892072077,
 -314450515401786039971942606]