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A179278 as a simple table

na(n)
11
21
31
44
54
66
76
88
99
1010
1110
1212
1312
1414
1515
1616
1716
1818
1918
2020
2121
2222
2322
2424
2525
2626
2727
2828
2928
3030
3130
3232
3333
3434
3535
3636
3736
3838
3939
4040
4140
4242
4342
4444
4545
4646
4746
4848
4949
5050
5151
5252
5352
5454
5555
5656
5757
5858
5958
6060
6160
6262
6363
6464
6565
6666
6766
6868
6969
7070
7170
7272

[1,1,1,4,4,6,6,8,9,10,10,12,12,14,15,16,16,18,18,
 20,21,22,22,24,25,26,27,28,28,30,30,32,33,34,35,
 36,36,38,39,40,40,42,42,44,45,46,46,48,49,50,51,
 52,52,54,55,56,57,58,58,60,60,62,63,64,65,66,66,
 68,69,70,70,72]