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A154121 as a simple table

na(n)
00
11
22
33
45
54
66
77
88
911
1012
1113
129
1310
1415
1514
1616
1717
1818
1919
2020
2121
2222
2328
2429
2530
2631
2732
2833
2934
3035
3123
3224
3336
3425
3526
3627
3739
3840
3941
4037
4138
4243
4342
4444
4545
4646
4747
4848
4949
5050
5152
5251
5353
5454
5555
5656
5757
5858
5959
6060
6161
6262
6363
6464
6579
6680
6781
6882
6983
7084
7185

[0,1,2,3,5,4,6,7,8,11,12,13,9,10,15,14,16,17,18,
 19,20,21,22,28,29,30,31,32,33,34,35,23,24,36,25,
 26,27,39,40,41,37,38,43,42,44,45,46,47,48,49,50,
 52,51,53,54,55,56,57,58,59,60,61,62,63,64,79,80,
 81,82,83,84,85]