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A288416 as a simple table

na(n)
12
24
32
44
510
68
710
88
910
1016
1118
1220
1318
1420
1526
1620
1726
1820
1926
2032
2126
2232
2334
2436
2534
2636
2734
2840
2934
3040
3150
3240
3350
3452
3550
3652
3750
3852
3950
4052
4158
4264
4358
4464
4558
4668
4758
4868
4974
5068
5174
5272
5374
5472
5582
5680
5782
5880
5982
6080
6182
6280
6390
64100
6590
66100

[2,4,2,4,10,8,10,8,10,16,18,20,18,20,26,20,26,20,
 26,32,26,32,34,36,34,36,34,40,34,40,50,40,50,52,
 50,52,50,52,50,52,58,64,58,64,58,68,58,68,74,68,
 74,72,74,72,82,80,82,80,82,80,82,80,90,100,90,100]