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A020548 as a simple table

na(n)
0-1
1-1
29
3649
451841
56825601
61489881601
7511943846401
8262183528857601
9191138113268121601
10191138824350351360001
11254405870811372994560001
12439613359905259699568640001
13965830554503712299093852160001

[-1,-1,9,649,51841,6825601,1489881601,
 511943846401,262183528857601,191138113268121601,
 191138824350351360001,254405870811372994560001,
 439613359905259699568640001,
 965830554503712299093852160001]