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A049988 as a simple table

na(n)
01
11
22
33
44
54
67
75
87
99
109
117
1214
138
1411
1516
1613
1710
1820
1911
2017
2121
2216
2313
2427
2517
2618
2726
2822
2916
3035
3117
3223
3331
3423
3525
3641
3720
3825
3936
4033
4122
4246
4323
4431
4548
4630
4725
4852
4929
5038
5147
5236
5328
5457
5537
5641
5752
5837
5931
6071
6132
6239
6362
6444
6543
6669
6735
6845
6962
7057
7137
7279
7338

[1,1,2,3,4,4,7,5,7,9,9,7,14,8,11,16,13,10,20,11,
 17,21,16,13,27,17,18,26,22,16,35,17,23,31,23,25,
 41,20,25,36,33,22,46,23,31,48,30,25,52,29,38,47,
 36,28,57,37,41,52,37,31,71,32,39,62,44,43,69,35,
 45,62,57,37,79,38]