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A112824 as a simple table

na(n)
20
30
40
52
60
74
82
92
104
118
126
1310
146
156
1610
1714
1812
1912
2014
2114
2210
2320
2414
2516
2618
2716
2816
2924
3022
3128
3220
3324
3424
3526
3626
3734
3826
3932
4030
4138
4236
4340
4436
4536
4628
4742
4836
4918
5044
5138
5240
5350
5442
5540
5650
5748
5840
5954
6052
6148
6242
6346
6442
6556
6656
6764
6848
6960
7064
7168
7266
7366
7448
7560

[0,0,0,2,0,4,2,2,4,8,6,10,6,6,10,14,12,12,14,14,
 10,20,14,16,18,16,16,24,22,28,20,24,24,26,26,34,
 26,32,30,38,36,40,36,36,28,42,36,18,44,38,40,50,
 42,40,50,48,40,54,52,48,42,46,42,56,56,64,48,60,
 64,68,66,66,48,60]