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A119394 as a simple table

na(n)
01
11
2-3
319
4-191
52301
6-5579
7-2972633
8365848449
9-41439009671
105100344009101
11-707810961855909
12111655250271582337
13-19997759486622720971
144047974925567723953349
15-920668079777059041167249
16233796999474238422487503361
17-65865180249832257997559536143

[1,1,-3,19,-191,2301,-5579,-2972633,365848449,
 -41439009671,5100344009101,-707810961855909,
 111655250271582337,-19997759486622720971,
 4047974925567723953349,-920668079777059041167249,
 233796999474238422487503361,
 -65865180249832257997559536143]