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A070320 as a simple table

na(n)
11
21
32
42
54
64
76
86
96
106
1110
1210
1312
1412
1512
1612
1716
1816
1918
2018
2118
2218
2322
2422
2522
2622
2722
2822
2928
3028
3130
3230
3330
3430
3530
3630
3736
3836
3936
4036
4140
4240
4342
4442
4542
4642
4746
4846
4946
5046
5146
5246
5352
5452
5552
5652
5752
5852
5958
6058
6160
6260
6360
6460
6560
6660
6766
6866
6966
7066
7170
7270

[1,1,2,2,4,4,6,6,6,6,10,10,12,12,12,12,16,16,18,
 18,18,18,22,22,22,22,22,22,28,28,30,30,30,30,30,
 30,36,36,36,36,40,40,42,42,42,42,46,46,46,46,46,
 46,52,52,52,52,52,52,58,58,60,60,60,60,60,60,66,
 66,66,66,70,70]