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A045865 as a simple table

na(n)
01
12
22
34
42
54
68
74
810
96
1012
1112
1216
134
1416
1516
1626
1720
1826
1916
2028
2120
2224
2324
2440
2514
2628
2720
2840
2912
3048
3116
3242
3336
3436
3532
3666
372
3840
3932
4060
4116
4264
4340
4448
4552
4648
4736
4888
4930
5062
5156
5276
5332
5480
5548
5680
5756
5860
5956
60112
6152
6264
6372
6474
6556
6696
6740
6868
6972
7096
7128

[1,2,2,4,2,4,8,4,10,6,12,12,16,4,16,16,26,20,26,
 16,28,20,24,24,40,14,28,20,40,12,48,16,42,36,36,
 32,66,2,40,32,60,16,64,40,48,52,48,36,88,30,62,56,
 76,32,80,48,80,56,60,56,112,52,64,72,74,56,96,40,
 68,72,96,28]