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A272480 as a simple table

na(n)
13
27
317
441
595
6223
7523
81201
92781
106445
1114731
1233859
1377899
14177523
15406115
16929825
172114387
184821367
1911001423
2024974353
2156813401
22129315249
23293157759
24665688917
251512325105
263424615395

[3,7,17,41,95,223,523,1201,2781,6445,14731,33859,
 77899,177523,406115,929825,2114387,4821367,
 11001423,24974353,56813401,129315249,293157759,
 665688917,1512325105,3424615395]