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A256137 as a simple table

na(n)
21
34
46
58
614
718
826
932
1042
1150
1262
1372
1486
1598
16114
17128
18146
19162
20182
21200
22222
23242
24266
25288
26314
27338
28366
29392
30422
31450
32482
33512
34546
35578
36614
37648
38686
39722
40762
41800
42842
43882
44926
45968
461014
471058
481106
491152
501202
511250
521302
531352
541406

[1,4,6,8,14,18,26,32,42,50,62,72,86,98,114,128,
 146,162,182,200,222,242,266,288,314,338,366,392,
 422,450,482,512,546,578,614,648,686,722,762,800,
 842,882,926,968,1014,1058,1106,1152,1202,1250,
 1302,1352,1406]