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A288447 as a simple table

na(n)
12
24
38
410
514
620
722
826
932
1040
11110
12116
13142
14148
15200
16370
17854
181166
191594
202164
214424
225942
239086
2413300
2515224
2620482
2722940
2827478
2947486

[2,4,8,10,14,20,22,26,32,40,110,116,142,148,200,
 370,854,1166,1594,2164,4424,5942,9086,13300,15224,
 20482,22940,27478,47486]