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A009715 as a simple table

na(n)
01
1-3
2-3
3273
4-5159
5-62139
616414101
7-1357293927
859192332081
95204089208589
10-1943937262679379
11331586038355507361
12-32236263434125968887
13-1484274347735103183531
141139055571050751311941445

[1,-3,-3,273,-5159,-62139,16414101,-1357293927,
 59192332081,5204089208589,-1943937262679379,
 331586038355507361,-32236263434125968887,
 -1484274347735103183531,1139055571050751311941445]