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A076501 as a simple table

na(n)
12
25
313
431
573
6173
7409
8967
93450844193
1039661481813
112076849234433
1252134281654579
1314838980942616539
14260230524377962793
154563650703502319197
1680032531899785490253
17172111744128569095516889

[2,5,13,31,73,173,409,967,3450844193,39661481813,
 2076849234433,52134281654579,14838980942616539,
 260230524377962793,4563650703502319197,
 80032531899785490253,172111744128569095516889]