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A235451 as a simple table

na(n)
01
12
24
33
46
56
67
78
810
99
1012
1112
1213
1314
1416
1515
1618
1718
1819
1920
2022
2121
2224
2324
2425
2526
2628
2727
2830
2930
3031
3132
3234
3333
3436
3536
3637
3738
3840
3939
4042
4142
4243
4344
4446
4545
4648
4748
4849
4950
5052
5151
5254
5354
5455
5556
5658
5757
5860
5960
6061

[1,2,4,3,6,6,7,8,10,9,12,12,13,14,16,15,18,18,19,
 20,22,21,24,24,25,26,28,27,30,30,31,32,34,33,36,
 36,37,38,40,39,42,42,43,44,46,45,48,48,49,50,52,
 51,54,54,55,56,58,57,60,60,61]