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A059940 as a simple table

na(n)
23
35
431
541
6107
711
817
9727
10499
11443
12863
13439
14457
153373
1623
171637
1853
196857
2031
2147
225323
23811
246911
25919
2629
2719681
28439
29739
3013499
3129789
3243
337187
3443
35461
3623327
3750651
3859
392579
402909
4122973
422179
4315901
4414197
45293
461187
4734607
4811059

[3,5,31,41,107,11,17,727,499,443,863,439,457,3373,
 23,1637,53,6857,31,47,5323,811,6911,919,29,19681,
 439,739,13499,29789,43,7187,43,461,23327,50651,59,
 2579,2909,22973,2179,15901,14197,293,1187,34607,
 11059]