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A279289 as a simple table

na(n)
15
27
39
411
513
614
715
816
917
1019
1120
1221
1322
1423
1525
1626
1727
1828
1929
2031
2132
2233
2334
2435
2536
2637
2738
2839
2940
3041
3142
3243
3344
3445
3546
3647
3748
3849
3950
4051
4152
4253
4354
4455
4556
4657
4758
4859
4960
5061
5162
5263
5364
5465
5566
5667
5768
5869
5970
6071
6172
6273
6374
6475
6576
6677

[5,7,9,11,13,14,15,16,17,19,20,21,22,23,25,26,27,
 28,29,31,32,33,34,35,36,37,38,39,40,41,42,43,44,
 45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,
 61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,
 77]