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A247430 as a simple table

na(n)
12
24
36
48
510
612
714
817
919
1021
1123
1225
1327
1429
1531
1633
1735
1837
1939
2042
2144
2246
2348
2450
2552
2654
2757
2859
2961
3063
3165
3267
3369
3471
3573
3675
3777
3879
3982
4084
4186
4288
4390
4492
4594
4697
4799
48101
49103
50106
51108
52110
53112
54114
55116
56118
57121
58123
59125
60127
61129
62131

[2,4,6,8,10,12,14,17,19,21,23,25,27,29,31,33,35,
 37,39,42,44,46,48,50,52,54,57,59,61,63,65,67,69,
 71,73,75,77,79,82,84,86,88,90,92,94,97,99,101,103,
 106,108,110,112,114,116,118,121,123,125,127,129,
 131]