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A089266 as a simple table

na(n)
12
23
34
44
56
67
76
89
910
108
1112
1211
1310
1415
1516
1612
1714
1819
1914
2021
2122
2214
2324
2422
2518
2627
2722
2820
2930
3031
3120
3226
3334
3424
3536
3637
3722
3832
3940
4028
4142
4234
4330
4445
4538
4632
4738
4849
4932
5051
5152
5228
5354
5455
5538
5657
5746
5838
5950
6056
6142
6251
6364
6444
6566
6656

[2,3,4,4,6,7,6,9,10,8,12,11,10,15,16,12,14,19,14,
 21,22,14,24,22,18,27,22,20,30,31,20,26,34,24,36,
 37,22,32,40,28,42,34,30,45,38,32,38,49,32,51,52,
 28,54,55,38,57,46,38,50,56,42,51,64,44,66,56]