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A157466 as a simple table

na(n)
01
12
23
34
45
56
67
77
88
99
1010
1111
1212
1312
1413
1513
1614
1714
1814
1915
2015
2116
2217
2317
2418
2519
2620
2720
2821
2922
3022
3123
3224
3324
3425
3525
3626
3726
3826
3926
4027
4128
4228
4328
4429
4529
4629
4729
4830
4931
5031
5131
5232
5332
5432
5532
5633
5734
5834
5935
6035
6136
6237
6337
6438
6539
6640
6741
6841
6942
7042
7142
7243

[1,2,3,4,5,6,7,7,8,9,10,11,12,12,13,13,14,14,14,
 15,15,16,17,17,18,19,20,20,21,22,22,23,24,24,25,
 25,26,26,26,26,27,28,28,28,29,29,29,29,30,31,31,
 31,32,32,32,32,33,34,34,35,35,36,37,37,38,39,40,
 41,41,42,42,42,43]