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A160397 as a simple table

na(n)
01
115
2-287
3-19665
4145857
542461775
6263532705
7-126489582225
8-2841844948095
9475473654572175
1020227326339404385
11-2131015216318470225
12-145885530188302549695
1310904674536236142816975
141134584206976883913024545
15-61145943971087413016708625

[1,15,-287,-19665,145857,42461775,263532705,
 -126489582225,-2841844948095,475473654572175,
 20227326339404385,-2131015216318470225,
 -145885530188302549695,10904674536236142816975,
 1134584206976883913024545,
 -61145943971087413016708625]