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A074792 as a simple table

na(n)
12
23
34
43
56
65
78
83
94
109
1112
125
1314
1413
1516
163
1718
185
1920
203
214
2221
2324
245
256
2625
274
2813
2930
3011
3132
323
3334
3433
3536
365
3738
3837
3916
403
4142
425
4344
4421
4516
4645
4748
485
498
509
5152
525
5354
545
5516
5613
577
5857
5960
607
6162
6261
634
643
6566
6623
6768
6813
6970
7029
7172
725
7374
7473
7516
7637
7778
7817
7980
803

[2,3,4,3,6,5,8,3,4,9,12,5,14,13,16,3,18,5,20,3,4,
 21,24,5,6,25,4,13,30,11,32,3,34,33,36,5,38,37,16,
 3,42,5,44,21,16,45,48,5,8,9,52,5,54,5,16,13,7,57,
 60,7,62,61,4,3,66,23,68,13,70,29,72,5,74,73,16,37,
 78,17,80,3]