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A123128 as a simple table

na(n)
12
24
35
48
57
610
79
812
915
1012
1117
1216
1315
1418
1521
1622
1719
1824
1923
2022
2127
2226
2329
2432
2529
2628
2731
2830
2933
3044
3135
3238
3335
3444
3537
3642
3743
3842
3945
4046
4143
4252
4345
4448
4547
4658
4759
4852
4951
5054
5157
5254
5363
5460
5561
5662
5759
5864
5963
6062
6171
6276
6367
6466
6569
6680
6773
6878
6971
7074
7177

[2,4,5,8,7,10,9,12,15,12,17,16,15,18,21,22,19,24,
 23,22,27,26,29,32,29,28,31,30,33,44,35,38,35,44,
 37,42,43,42,45,46,43,52,45,48,47,58,59,52,51,54,
 57,54,63,60,61,62,59,64,63,62,71,76,67,66,69,80,
 73,78,71,74,77]