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A271509 as a simple table

na(n)
15
25
35
45
52
613
713
813
913
1014
1117
1217
1317
1417
1514
1625
1725
1825
1925
2034
2129
2229
2329
2429
252
2637
2737
2837
2937
3046
3141
3241
3341
3441
3562
3653
3753
3853
3953
4034
4161
4261
4361
4461
4598
4665
4765
4865
4965
5094
5165
5265
5365
5465
5546
5673
5773
5873
5973
6014

[5,5,5,5,2,13,13,13,13,14,17,17,17,17,14,25,25,25,
 25,34,29,29,29,29,2,37,37,37,37,46,41,41,41,41,62,
 53,53,53,53,34,61,61,61,61,98,65,65,65,65,94,65,
 65,65,65,46,73,73,73,73,14]