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A015921 as a simple table

na(n)
11
22
34
46
510
612
714
822
926
1030
1134
1238
1346
1458
1562
1674
1782
1886
1994
20106
21118
22122
23132
24134
25142
26146
27158
28166
29170
30178
31182
32194
33202
34206
35214
36218
37226
38254
39262
40274
41278
42298
43302
44314
45326
46334
47346
48358
49362
50372
51382
52386
53394
54398
55422
56446

[1,2,4,6,10,12,14,22,26,30,34,38,46,58,62,74,82,
 86,94,106,118,122,132,134,142,146,158,166,170,178,
 182,194,202,206,214,218,226,254,262,274,278,298,
 302,314,326,334,346,358,362,372,382,386,394,398,
 422,446]