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A274444 as a simple table

na(n)
115
265
335
415
521
635
715
835
935
1077
1135
1255
1355
14143
15119
1651
1795
18155
1955
20323
2195
22119
2339
24391
2587
26209
27119
28299
29143
30341
31319
32629
33259
34899
35407
36185
37119
38299
39287
401517
41203
42799
43159
44155
45407
461189
47119
48517
49341
501763
511363
52629
53335
542491
55493
563599

[15,65,35,15,21,35,15,35,35,77,35,55,55,143,119,
 51,95,155,55,323,95,119,39,391,87,209,119,299,143,
 341,319,629,259,899,407,185,119,299,287,1517,203,
 799,159,155,407,1189,119,517,341,1763,1363,629,
 335,2491,493,3599]