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A307080 as a simple table

na(n)
01
10
2-3
319
4497
5-1899
6-489491
7-15433676
8618450881
9120846851155
107012261819901
11-467816186167659
12-175527285590430863
13-20961845760818684812
14568194037748383908653
15898095630359015975379151
16220433074470274983356464897
1716144974747716546214909454181

[1,0,-3,19,497,-1899,-489491,-15433676,618450881,
 120846851155,7012261819901,-467816186167659,
 -175527285590430863,-20961845760818684812,
 568194037748383908653,898095630359015975379151,
 220433074470274983356464897,
 16144974747716546214909454181]