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A292651 as a simple table

na(n)
12
24
36
48
510
612
715
817
919
1021
1123
1225
1328
1430
1532
1634
1736
1838
1940
2043
2145
2247
2349
2451
2553
2656
2758
2860
2962
3064
3166
3268
3371
3473
3575
3677
3779
3881
3984
4086
4188
4290
4392
4494
4597
4699
47101
48103
49105
50107
51109
52112
53114
54116
55118
56120
57122
58125
59127
60129
61131
62133

[2,4,6,8,10,12,15,17,19,21,23,25,28,30,32,34,36,
 38,40,43,45,47,49,51,53,56,58,60,62,64,66,68,71,
 73,75,77,79,81,84,86,88,90,92,94,97,99,101,103,
 105,107,109,112,114,116,118,120,122,125,127,129,
 131,133]