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A355529 as a simple table

na(n)
12
24
36
48
59
610
712
814
916
1018
1120
1221
1322
1424
1525
1626
1727
1828
1930
2032
2134
2236
2338
2440
2542
2644
2745
2846
2948
3049
3150
3252
3354
3456
3557
3658
3760
3862
3963
4064
4166
4268
4370
4472
4574
4675
4776
4878
4980
5081
5182
5284
5386
5488
5590
5692
5794
5896
5998
6099
61100
62102
63104
64105
65106

[2,4,6,8,9,10,12,14,16,18,20,21,22,24,25,26,27,28,
 30,32,34,36,38,40,42,44,45,46,48,49,50,52,54,56,
 57,58,60,62,63,64,66,68,70,72,74,75,76,78,80,81,
 82,84,86,88,90,92,94,96,98,99,100,102,104,105,106]