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A013107 as a simple table

na(n)
02
1-19
21041
3-141489
435842401
5-14587836921
68707393003617
7-7166002987401489
87776862795242656577
9-10760731866324884664297
1018490186709158886988610113
11-38627726709262739118225523137

[2,-19,1041,-141489,35842401,-14587836921,
 8707393003617,-7166002987401489,
 7776862795242656577,-10760731866324884664297,
 18490186709158886988610113,
 -38627726709262739118225523137]