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A224091 as a simple table

na(n)
01
13
2-3
321
4-1971
55751
6-266181
7854433
8-1087330509
96616763613
10-1057298446683
1125843570964217
12-737661045963969
1334231787523995913
14-10476141073704096633
15113994653806532247759
16-3044068940426043606244569
1711175422214362891188037157

[1,3,-3,21,-1971,5751,-266181,854433,-1087330509,
 6616763613,-1057298446683,25843570964217,
 -737661045963969,34231787523995913,
 -10476141073704096633,113994653806532247759,
 -3044068940426043606244569,
 11175422214362891188037157]