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A246592 as a simple table

na(n)
00
11
21
33
42
53
65
77
84
95
106
117
1210
1311
1413
1515
168
179
1810
1911
2012
2113
2214
2315
2420
2521
2622
2723
2826
2927
3029
3131
3216
3317
3418
3519
3620
3721
3822
3923
4024
4125
4226
4327
4428
4529
4630
4731
4840
4941
5042
5143
5244
5345
5446
5547
5652
5753
5854
5955
6058
6159
6261
6363
6432
6533
6634
6735
6836

[0,1,1,3,2,3,5,7,4,5,6,7,10,11,13,15,8,9,10,11,12,
 13,14,15,20,21,22,23,26,27,29,31,16,17,18,19,20,
 21,22,23,24,25,26,27,28,29,30,31,40,41,42,43,44,
 45,46,47,52,53,54,55,58,59,61,63,32,33,34,35,36]