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A337937 as a simple table

na(n)
11
21
32
44
56
64
74
810
912
106
118
1216
1318
148
1510
1622
1720
1812
1912
2028
2130
2216
2316
2424
2536
2618
2716
2840
2942
3020
3122
3246
3342
3420
3524
3652
3740
3824
3928
4058
4160
4230
4332
4448
4566
4632
4724
4870
4972
5036
5136
5260
5378
5432
5540
5682
5764
5842
5940
6088

[1,1,2,4,6,4,4,10,12,6,8,16,18,8,10,22,20,12,12,
 28,30,16,16,24,36,18,16,40,42,20,22,46,42,20,24,
 52,40,24,28,58,60,30,32,48,66,32,24,70,72,36,36,
 60,78,32,40,82,64,42,40,88]