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A209249 as a simple table

na(n)
12
26
38
412
514
616
718
820
922
1024
1126
1228
1330
1432
1534
1636
1738
1840
1942
2044
2146
2248
2350
2452
2556
2658
2760
2862
2964
3066
3168
3270
3372
3474
3576
3678
3780
3882
3984
4086
4188
4292
4394
4496
45100
46102
47106
48108
49110
50112
51114
52116
53118
54120
55124
56128
57130
58132
59134
60136
61138

[2,6,8,12,14,16,18,20,22,24,26,28,30,32,34,36,38,
 40,42,44,46,48,50,52,56,58,60,62,64,66,68,70,72,
 74,76,78,80,82,84,86,88,92,94,96,100,102,106,108,
 110,112,114,116,118,120,124,128,130,132,134,136,
 138]