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A081665 as a simple table

na(n)
11
24
33
45
52
63
74
85
910
101
119
128
1315
147
1513
166
1717
1811
1921
205
2114
229
2313
2425
254
2615
2711
287
2917
3010
3116
3225
333
3423
3514
3611
378
3813
3923
405
4112
427
4316
449
4511
4613
4717
4825
4951
502
5127
5217
5313
5411
559
5616
577
5812
5922
605
6113
628
6311
6414
6520
663
6728
6816
6913
7010
717
7211
7315
7427
754
7613
779
7814
7924
805
8111

[1,4,3,5,2,3,4,5,10,1,9,8,15,7,13,6,17,11,21,5,14,
 9,13,25,4,15,11,7,17,10,16,25,3,23,14,11,8,13,23,
 5,12,7,16,9,11,13,17,25,51,2,27,17,13,11,9,16,7,
 12,22,5,13,8,11,14,20,3,28,16,13,10,7,11,15,27,4,
 13,9,14,24,5,11]