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A251885 as a simple table

na(n)
15495
211492
311492
420025
516857
620025
749529
836085
936085
1049529
11117744
12100787
1394046
14100787
15117744
16256604
17242531
18237142
19237142
20242531
21256604
22676969
23725325
24848547
251036785
26848547
27725325
28676969
291694929
302472269

[5495,11492,11492,20025,16857,20025,49529,36085,
 36085,49529,117744,100787,94046,100787,117744,
 256604,242531,237142,237142,242531,256604,676969,
 725325,848547,1036785,848547,725325,676969,
 1694929,2472269]