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A291365 as a simple table

na(n)
12
22
34
46
512
616
726
836
952
1064
1186
12108
13142
14170
15206
16242
17294
18340
19404
20468
21544
22610
23698
24786
25894
26990
271104
281218
291360
301494
311658
321822
332006
342174
352366
362558
372786
382996
393230
403464

[2,2,4,6,12,16,26,36,52,64,86,108,142,170,206,242,
 294,340,404,468,544,610,698,786,894,990,1104,1218,
 1360,1494,1658,1822,2006,2174,2366,2558,2786,2996,
 3230,3464]