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A259860 as a simple table

na(n)
01
15
212
312
4-29
5-169
6-408
7-408
8985
95741
1013860
1113860
12-33461
13-195025
14-470832
15-470832
161136689
176625109
1815994428
1915994428
20-38613965
21-225058681
22-543339720
23-543339720
241311738121
257645370045
2618457556052
2718457556052
28-44560482149

[1,5,12,12,-29,-169,-408,-408,985,5741,13860,
 13860,-33461,-195025,-470832,-470832,1136689,
 6625109,15994428,15994428,-38613965,-225058681,
 -543339720,-543339720,1311738121,7645370045,
 18457556052,18457556052,-44560482149]