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A168342 as a simple table

na(n)
12
24
312
410
58
66
720
818
916
1014
1138
1236
1334
1432
1530
1628
1726
1824
1922
2056
2154
2252
2350
2448
2546
2644
2742
2840
2988
3086
3184
3282
3380
3478
3576
3674
3772
3870
3968
4066
4164
4262
4360
4458
45120
46118
47116
48114
49112
50110
51108
52106
53104
54102
55100
5698
5796
5894
5992
6090

[2,4,12,10,8,6,20,18,16,14,38,36,34,32,30,28,26,
 24,22,56,54,52,50,48,46,44,42,40,88,86,84,82,80,
 78,76,74,72,70,68,66,64,62,60,58,120,118,116,114,
 112,110,108,106,104,102,100,98,96,94,92,90]