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A258608 as a simple table

na(n)
16056521
216806958
320602521
426101881
542003361
687260319
7168065296
8336081087
9600593049
101104953167
111878008896
123265742205
135334257296
148852106046
1513973131264
1622289465664
1734154366481
1852671100026
1978627524836

[6056521,16806958,20602521,26101881,42003361,
 87260319,168065296,336081087,600593049,1104953167,
 1878008896,3265742205,5334257296,8852106046,
 13973131264,22289465664,34154366481,52671100026,
 78627524836]