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A121512 as a simple table

na(n)
11
24
310
44
57
613
77
810
916
1010
1113
1219
1313
1416
1522
1616
1719
1825
1919
2022
2128
2222
2325
2431
2525
2628
2734
2828
2931
3037
3131
3234
3340
3434
3537
3643
3737
3840
3946
4040
4143
4249
4343
4446
4552
4646
4749
4855
4949
5052
5158
5252
5355
5461
5555
5658
5764
5858
5961
6067
6161
6264
6370
6464
6567
6673

[1,4,10,4,7,13,7,10,16,10,13,19,13,16,22,16,19,25,
 19,22,28,22,25,31,25,28,34,28,31,37,31,34,40,34,
 37,43,37,40,46,40,43,49,43,46,52,46,49,55,49,52,
 58,52,55,61,55,58,64,58,61,67,61,64,70,64,67,73]