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A121411 as a simple table

na(n)
12
25
36
48
510
612
713
817
918
1020
1121
1222
1326
1428
1530
1632
1733
1837
1938
2040
2142
2245
2346
2448
2550
2652
2753
2856
2958
3060
3161
3262
3365
3466
3568
3670
3772
3876
3977
4078
4180
4282
4385
4486
4588
4690
4792
4893
4996
5097
5198

[2,5,6,8,10,12,13,17,18,20,21,22,26,28,30,32,33,
 37,38,40,42,45,46,48,50,52,53,56,58,60,61,62,65,
 66,68,70,72,76,77,78,80,82,85,86,88,90,92,93,96,
 97,98]