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A023992 as a simple table

na(n)
11
23
37
49
511
611
715
815
919
1018
1119
1221
1324
1422
1525
1626
1728
1826
1929
2029
2134
2233
2334
2436
2538
2635
2738
2838
2939
3038
3141
3242
3344
3443
3544
3646
3749
3845
3950
4050
4152
4251
4354
4455
4558
4655
4756
4858
4961
5057
5160
5260
5361
5460
5563
5662
5766
5864
5966
6067
6171
6268
6370
6472
6573
6670
6772
6870
6976
7074
7175
7277
7379
7476

[1,3,7,9,11,11,15,15,19,18,19,21,24,22,25,26,28,
 26,29,29,34,33,34,36,38,35,38,38,39,38,41,42,44,
 43,44,46,49,45,50,50,52,51,54,55,58,55,56,58,61,
 57,60,60,61,60,63,62,66,64,66,67,71,68,70,72,73,
 70,72,70,76,74,75,77,79,76]