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A182339 as a simple table

na(n)
12
24
36
48
59
610
712
814
916
1018
1120
1222
1324
1425
1526
1628
1730
1832
1934
2036
2138
2240
2342
2444
2545
2646
2748
2849
2950
3052
3154
3256
3358
3460
3562
3663
3764
3866
3968
4070
4172
4274
4375
4476
4578
4680
4781
4882
4984
5086
5188
5290
5392
5494
5596
5698
5799
58100
59102
60104
61106
62108
63110
64112

[2,4,6,8,9,10,12,14,16,18,20,22,24,25,26,28,30,32,
 34,36,38,40,42,44,45,46,48,49,50,52,54,56,58,60,
 62,63,64,66,68,70,72,74,75,76,78,80,81,82,84,86,
 88,90,92,94,96,98,99,100,102,104,106,108,110,112]