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A158956 as a simple table

na(n)
01
1-1
2-13
310
41813
5-470
6-161653
742070
813387093
9-6278606
10-5451121865
111420802350
1261102622050543
13-455069110262
14-50154461699251
15196108344641350
162099332299244083701
17-109448263403739038
18-2062360862658074555671
1976800655398762907870

[1,-1,-13,10,1813,-470,-161653,42070,13387093,
 -6278606,-5451121865,1420802350,61102622050543,
 -455069110262,-50154461699251,196108344641350,
 2099332299244083701,-109448263403739038,
 -2062360862658074555671,76800655398762907870]