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A189466 as a simple table

na(n)
12
24
36
48
59
610
712
813
914
1015
1116
1217
1318
1419
1520
1621
1722
1823
1923
2024
2125
2225
2326
2427
2528
2628
2729
2830
2931
3032
3133
3233
3334
3434
3535
3636
3736
3837
3938
4038
4139
4239
4340
4441
4541
4642
4742
4843
4943
5044
5144
5246
5346
5446
5547
5647
5748
5849
5949
6050
6150
6251
6351
6452
6552
6653

[2,4,6,8,9,10,12,13,14,15,16,17,18,19,20,21,22,23,
 23,24,25,25,26,27,28,28,29,30,31,32,33,33,34,34,
 35,36,36,37,38,38,39,39,40,41,41,42,42,43,43,44,
 44,46,46,46,47,47,48,49,49,50,50,51,51,52,52,53]