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A339944 as a simple table

na(n)
1-1
2-1
3-1
4-1
53
65
717
813
919
1047
1179
1273
13113
14109
15193
16317
17313
18521
19503
20523
21887
221499
231231
241319
251373
261321
271307
283947
292473
302143
312477
327369
335573
345939
359967
3616111
3718587
3820773
3918593
4031883
4117209
4219597
4324251
4419609
4525471
4631397
4744389
4818803
4938459
5038461
5166191
5269557
53103183

[-1,-1,-1,-1,3,5,17,13,19,47,79,73,113,109,193,
 317,313,521,503,523,887,1499,1231,1319,1373,1321,
 1307,3947,2473,2143,2477,7369,5573,5939,9967,
 16111,18587,20773,18593,31883,17209,19597,24251,
 19609,25471,31397,44389,18803,38459,38461,66191,
 69557,103183]