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A028802 as a simple table

na(n)
13
26
37
412
513
614
715
819
923
1024
1126
1227
1328
1429
1530
1631
1733
1835
1937
2038
2141
2243
2346
2448
2551
2652
2754
2856
2958
3059
3160
3261
3362
3463
3565
3666
3770
3874
3975
4076
4177
4282
4383
4486

[3,6,7,12,13,14,15,19,23,24,26,27,28,29,30,31,33,
 35,37,38,41,43,46,48,51,52,54,56,58,59,60,61,62,
 63,65,66,70,74,75,76,77,82,83,86]