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A207188 as a simple table

na(n)
12
24
36
49
511
613
715
817
920
1022
1124
1226
1328
1430
1532
1634
1736
1838
1940
2043
2145
2247
2349
2451
2553
2655
2757
2859
2961
3063
3165
3267
3369
3471
3573
3675
3777
3879
3981
4083
4185
4287
4390
4492
4594
4696
4798
48100
49102
50104
51106
52108
53110
54112
55114
56116
57118
58120
59122
60124
61126
62128

[2,4,6,9,11,13,15,17,20,22,24,26,28,30,32,34,36,
 38,40,43,45,47,49,51,53,55,57,59,61,63,65,67,69,
 71,73,75,77,79,81,83,85,87,90,92,94,96,98,100,102,
 104,106,108,110,112,114,116,118,120,122,124,126,
 128]