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A191638 as a simple table

na(n)
11
23
37
423
573
6240
7819
82849
910082
1036157
11131071
12479349
131766022
146547206
1524403223
1691382282
17343597383
181296593900
194908534052
2018635790301
2170936234050
22270649016067
231034834473200
243964436291699
2515214863605981
2658488306848967
27225179981368524

[1,3,7,23,73,240,819,2849,10082,36157,131071,
 479349,1766022,6547206,24403223,91382282,
 343597383,1296593900,4908534052,18635790301,
 70936234050,270649016067,1034834473200,
 3964436291699,15214863605981,58488306848967,
 225179981368524]