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A153347 as a simple table

na(n)
12
24
36
47
58
610
712
813
914
1016
1117
1218
1319
1420
1521
1622
1724
1825
1926
2027
2128
2230
2331
2432
2534
2636
2737
2838
2940
3042
3143
3244
3346
3447
3548
3649
3750
3852
3954
4055
4156
4257
4358
4460
4561
4662
4763
4864
4965
5066
5167
5268
5370
5471
5572
5673
5774
5876
5977
6078
6179
6280
6382
6484
6585
6686
6787
6888
6990
7091
7192

[2,4,6,7,8,10,12,13,14,16,17,18,19,20,21,22,24,25,
 26,27,28,30,31,32,34,36,37,38,40,42,43,44,46,47,
 48,49,50,52,54,55,56,57,58,60,61,62,63,64,65,66,
 67,68,70,71,72,73,74,76,77,78,79,80,82,84,85,86,
 87,88,90,91,92]