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A051597 as a simple table

na(n)
01
12
22
33
44
53
64
77
87
94
105
1111
1214
1311
145
156
1616
1725
1825
1916
206
217
2222
2341
2450
2541
2622
277
288
2929
3063
3191
3291
3363
3429
358
369
3737
3892
39154
40182
41154
4292
4337
449
4510
4646
47129
48246
49336
50336
51246
52129
5346
5410
5511
5656
57175
58375
59582
60672
61582
62375
63175
6456
6511

[1,2,2,3,4,3,4,7,7,4,5,11,14,11,5,6,16,25,25,16,6,
 7,22,41,50,41,22,7,8,29,63,91,91,63,29,8,9,37,92,
 154,182,154,92,37,9,10,46,129,246,336,336,246,129,
 46,10,11,56,175,375,582,672,582,375,175,56,11]