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A268388 as a simple table

na(n)
16
28
310
412
514
615
718
820
921
1022
1124
1226
1327
1428
1530
1632
1733
1834
1935
2036
2138
2239
2340
2442
2544
2645
2746
2848
2950
3051
3152
3254
3355
3456
3557
3658
3760
3862
3963
4064
4165
4266
4368
4469
4570
4672
4774
4875
4976
5077
5178
5280
5382
5484
5585
5686
5787
5888
5990
6091
6192
6293
6394
6495
6596
6698
6799
68100
69102
70104
71105
72106
73108
74110
75111
76112
77114
78115
79116
80117
81118
82119
83120

[6,8,10,12,14,15,18,20,21,22,24,26,27,28,30,32,33,
 34,35,36,38,39,40,42,44,45,46,48,50,51,52,54,55,
 56,57,58,60,62,63,64,65,66,68,69,70,72,74,75,76,
 77,78,80,82,84,85,86,87,88,90,91,92,93,94,95,96,
 98,99,100,102,104,105,106,108,110,111,112,114,115,
 116,117,118,119,120]