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A138204 as a simple table

na(n)
12
24
36
47
58
610
712
813
914
1015
1116
1218
1319
1420
1522
1623
1724
1825
1926
2028
2129
2230
2331
2432
2534
2635
2736
2838
2939
3040
3141
3242
3344
3445
3546
3647
3748
3849
3950
4052
4153
4254
4355
4456
4557
4658
4760
4861
4962
5063
5164
5265
5366
5467
5568
5670
5771
5872
5973
6074
6175
6276
6377
6478
6579
6680
6782
6883
6984
7085
7186

[2,4,6,7,8,10,12,13,14,15,16,18,19,20,22,23,24,25,
 26,28,29,30,31,32,34,35,36,38,39,40,41,42,44,45,
 46,47,48,49,50,52,53,54,55,56,57,58,60,61,62,63,
 64,65,66,67,68,70,71,72,73,74,75,76,77,78,79,80,
 82,83,84,85,86]