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A075409 as a simple table

na(n)
20
31
45
57
619
719
831
917
1011
1117
1283
1367
14353
15227
16163
1759
1861
19113
20353
2131
221447
23571
24389
25191
26337
27883
28101
291823
30659
31709
32163
331361
34439
35307
361093
371733
382491
391063
401091
411999
421439
43109
442753
45607
462617
47269
48103
492663
50337
5114447
522221
535471
542887

[0,1,5,7,19,19,31,17,11,17,83,67,353,227,163,59,
 61,113,353,31,1447,571,389,191,337,883,101,1823,
 659,709,163,1361,439,307,1093,1733,2491,1063,1091,
 1999,1439,109,2753,607,2617,269,103,2663,337,
 14447,2221,5471,2887]