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A260902 as a simple table

na(n)
0-1
13
21
327
4289
54683
695761
72382747
869870529
92359997163
1090239163121
113853391348667
12181765659243169
139386568200722443
14526713953100688081
1531912283163641549787
162076293242327577102209
17144382074825232693748523
1810686433228580787658046641

[-1,3,1,27,289,4683,95761,2382747,69870529,
 2359997163,90239163121,3853391348667,
 181765659243169,9386568200722443,
 526713953100688081,31912283163641549787,
 2076293242327577102209,144382074825232693748523,
 10686433228580787658046641]