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A374456 as a simple table

na(n)
11
21
32
44
52
66
74
84
910
1012
116
128
1316
1418
1512
1610
1722
188
1912
2018
2128
228
2330
2416
2520
2616
2724
2836
2918
3024
3116
3240
3312
3442
3522
3646
3732
3852
3918
4040
4124
4236
4328
4458
4560
4630
4748
4820
4966
5044
5124
5270
5372
5436
5560
5624
5778
5840
5982
6064
6142
6256
6340
6488
6572
6660
6746
6872
6932
7096

[1,1,2,4,2,6,4,4,10,12,6,8,16,18,12,10,22,8,12,18,
 28,8,30,16,20,16,24,36,18,24,16,40,12,42,22,46,32,
 52,18,40,24,36,28,58,60,30,48,20,66,44,24,70,72,
 36,60,24,78,40,82,64,42,56,40,88,72,60,46,72,32,
 96]