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A168271 as a simple table

na(n)
11
23
35
49
57
69
712
816
914
1013
1117
1220
1317
1421
1525
1625
1721
1821
1917
2019
2135
2232
2328
2431
2525
2631
2733
2833
2939
3047
3133
3230
3347
3449
3539
3639
3737
3843
3944
4044
4143
4241
4338
4448
4558
4659
4747
4835
4950
5058
5155
5259
5371
5464
5561
5661
5762
5871
5975
6071
6181
6275
6362
6463
6569
6670
6757
6863
6959
7061
7163

[1,3,5,9,7,9,12,16,14,13,17,20,17,21,25,25,21,21,
 17,19,35,32,28,31,25,31,33,33,39,47,33,30,47,49,
 39,39,37,43,44,44,43,41,38,48,58,59,47,35,50,58,
 55,59,71,64,61,61,62,71,75,71,81,75,62,63,69,70,
 57,63,59,61,63]