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A081728 as a simple table

na(n)
11
22
32
46
510
66
78
818
922
1014
1130
1218
1320
1442
1546
1626
1758
1830
1966
2070
2136
2278
2382
2444
2548
2650
27102
28106
2954
3056
31126
32130
3368
34138
3574
36150
3778
38162
39166
4086
41178
4290
43190
4496
4598
46198
47210
48222
49226
50114
51116
52238
53120
54250
55128
56262
57134
58270
59138
60140
61282
62146

[1,2,2,6,10,6,8,18,22,14,30,18,20,42,46,26,58,30,
 66,70,36,78,82,44,48,50,102,106,54,56,126,130,68,
 138,74,150,78,162,166,86,178,90,190,96,98,198,210,
 222,226,114,116,238,120,250,128,262,134,270,138,
 140,282,146]