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A321809 as a simple table

na(n)
11
2-4097
3531442
4-16773121
5244140626
6-2177317874
713841287202
8-68702695425
9282430067923
10-1000244144722
113138428376722
12-8913940970482
1323298085122482
14-56707753666594
15129746582562692
16-281406240452609
17582622237229762

[1,-4097,531442,-16773121,244140626,-2177317874,
 13841287202,-68702695425,282430067923,
 -1000244144722,3138428376722,-8913940970482,
 23298085122482,-56707753666594,129746582562692,
 -281406240452609,582622237229762]