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A049448 as a simple table

na(n)
01
12
23
34
45
55
67
78
87
96
109
1111
1210
1311
1413
1512
169
177
1811
1914
2013
2115
2218
2317
2413
2514
2619
2721
2818
2917
3019
3116
3211
338
3413
3517
3616
3719
3823
3922
4017
4119
4226
4329
4425
4524
4627
4723
4816
4917
5025
5130
5227
5329
5434
5531
5623
5722
5829
5931
6026
6123
6225
6320
6413
659
6615
6720
6819
6923

[1,2,3,4,5,5,7,8,7,6,9,11,10,11,13,12,9,7,11,14,
 13,15,18,17,13,14,19,21,18,17,19,16,11,8,13,17,16,
 19,23,22,17,19,26,29,25,24,27,23,16,17,25,30,27,
 29,34,31,23,22,29,31,26,23,25,20,13,9,15,20,19,23]