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A262341 as a simple table

na(n)
11
21
32
43
55
61
713
87
917
1011
1189
121
13233
1429
1561
1647
171597
1819
19113
2041
21421
22199
2328657
2423
253001
26521
27109
28281
29514229
3031
312417
322207
3319801
343571
35141961
36107
372221
389349
39135721
402161
4159369
42211
43433494437
44307
45109441
46461
472971215073
481103
496168709
50151

[1,1,2,3,5,1,13,7,17,11,89,1,233,29,61,47,1597,19,
 113,41,421,199,28657,23,3001,521,109,281,514229,
 31,2417,2207,19801,3571,141961,107,2221,9349,
 135721,2161,59369,211,433494437,307,109441,461,
 2971215073,1103,6168709,151]