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A050505 as a simple table

na(n)
12
24
35
46
58
610
711
812
914
1016
1117
1218
1319
1420
1522
1623
1724
1826
1927
2028
2129
2230
2332
2434
2535
2636
2738
2839
2940
3041
3142
3244
3345
3446
3547
3648
3750
3852
3953
4054
4155
4256
4357
4458
4559
4660
4761
4862
4964
5065
5166
5268
5370
5471
5572
5674
5776
5877
5978
6080
6181
6282
6383
6484
6585
6686
6788
6889
6990
7091
7192

[2,4,5,6,8,10,11,12,14,16,17,18,19,20,22,23,24,26,
 27,28,29,30,32,34,35,36,38,39,40,41,42,44,45,46,
 47,48,50,52,53,54,55,56,57,58,59,60,61,62,64,65,
 66,68,70,71,72,74,76,77,78,80,81,82,83,84,85,86,
 88,89,90,91,92]