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A280236 as a simple table

na(n)
12
26
38
412
520
624
728
830
932
1036
1140
1244
1348
1450
1554
1656
1760
1864
1966
2070
2172
2280
2388
2490
2596

[2,6,8,12,20,24,28,30,32,36,40,44,48,50,54,56,60,
 64,66,70,72,80,88,90,96]