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A156597 as a simple table

na(n)
01
1-5
2-66
32105
423430
5-630125
6-20601306
73107848465
833784742310
9-1638545276075
10-89035949216346
1110555858770407435
12344142156014772390
13-24109481481788468225
14-1834034118141953047386
151186029324751829139122225
1612888926737616798410805670

[1,-5,-66,2105,23430,-630125,-20601306,3107848465,
 33784742310,-1638545276075,-89035949216346,
 10555858770407435,344142156014772390,
 -24109481481788468225,-1834034118141953047386,
 1186029324751829139122225,
 12888926737616798410805670]