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A249025 as a simple table

na(n)
12
24
35
46
58
610
712
814
915
1016
1118
1220
1322
1424
1525
1626
1728
1830
1932
2034
2135
2236
2338
2439
2540
2642
2744
2845
2946
3048
3150
3252
3354
3455
3556
3658
3760
3862
3964
4065
4166
4268
4370
4472
4574
4675
4776
4878
4980
5082
5184
5285
5386
5488
5590
5692
5794
5895
5996
6098
61100
62102
63104
64105
65106

[2,4,5,6,8,10,12,14,15,16,18,20,22,24,25,26,28,30,
 32,34,35,36,38,39,40,42,44,45,46,48,50,52,54,55,
 56,58,60,62,64,65,66,68,70,72,74,75,76,78,80,82,
 84,85,86,88,90,92,94,95,96,98,100,102,104,105,106]