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A001580 as a simple table

na(n)
01
13
28
317
432
557
6100
7177
8320
9593
101124
112169
124240
138361
1416580
1532993
1665792
17131361
18262468
19524649
201048976
212097593
224194788
238389137
2416777792
2533555057
2667109540
27134218457
28268436240

[1,3,8,17,32,57,100,177,320,593,1124,2169,4240,
 8361,16580,32993,65792,131361,262468,524649,
 1048976,2097593,4194788,8389137,16777792,33555057,
 67109540,134218457,268436240]