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A331303 as a simple table

na(n)
01
12
23
34
45
56
67
76
88
99
1010
1111
1212
1313
1414
1515
1616
1717
1818
1911
2019
2115
2214
2320
2421
2517
2622
2723
2824
2925
3026
3127
3228
3329
3430
3531
3632
3727
3833
3934
4035
4136
4237
4338
4439
4540
4630
4741
4842
4938
5043
5144
5245
5346
5447
5525
5648
5729
5833
5949
6050
6141
6251
6340
6428
6549
6637
6736
6852
6953
7043
7154
7255
7331
7451
7544
7639
7754
7856
7946
8057
8158
8259
8360
8461
8562
8663
8764
8865
8966
9067
9168
9269

[1,2,3,4,5,6,7,6,8,9,10,11,12,13,14,15,16,17,18,
 11,19,15,14,20,21,17,22,23,24,25,26,27,28,29,30,
 31,32,27,33,34,35,36,37,38,39,40,30,41,42,38,43,
 44,45,46,47,25,48,29,33,49,50,41,51,40,28,49,37,
 36,52,53,43,54,55,31,51,44,39,54,56,46,57,58,59,
 60,61,62,63,64,65,66,67,68,69]