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A026433 as a simple table

na(n)
12
23
34
46
58
69
710
812
913
1014
1116
1218
1320
1421
1522
1624
1728
1830
1932
2033
2134
2236
2337
2440
2542
2644
2745
2846
2948
3049
3150
3252
3354
3456
3557
3658
3760
3861
3964
4066
4168
4269
4370
4472
4574
4675
4776
4878
4980
5081
5182
5284
5385
5486
5588
5690
5792
5893
5994
6096

[2,3,4,6,8,9,10,12,13,14,16,18,20,21,22,24,28,30,
 32,33,34,36,37,40,42,44,45,46,48,49,50,52,54,56,
 57,58,60,61,64,66,68,69,70,72,74,75,76,78,80,81,
 82,84,85,86,88,90,92,93,94,96]