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A100076 as a simple table

na(n)
01
11
21
3-3
49
5-33
6513
7-10917
8155313
9-869697
10-27095391
111126973331
12-25370851671
13400873570911
14-3945969886815
15-19472448499317
163355787673885537
17-205870807636111233
1810635145244261722305
19-447262563680813504349
2013896854240554592685081

[1,1,1,-3,9,-33,513,-10917,155313,-869697,
 -27095391,1126973331,-25370851671,400873570911,
 -3945969886815,-19472448499317,3355787673885537,
 -205870807636111233,10635145244261722305,
 -447262563680813504349,13896854240554592685081]