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A089850 as a simple table

na(n)
00
11
22
33
45
54
66
77
88
912
1013
1111
129
1310
1415
1514
1616
1717
1818
1919
2020
2121
2222
2331
2432
2534
2635
2736
2830
2933
3028
3123
3224
3329
3425
3526
3627
3740
3841
3939
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
6587
6688
6790
6891
6992
7096
7197
7299

[0,1,2,3,5,4,6,7,8,12,13,11,9,10,15,14,16,17,18,
 19,20,21,22,31,32,34,35,36,30,33,28,23,24,29,25,
 26,27,40,41,39,37,38,43,42,44,45,46,47,48,49,50,
 52,51,53,54,55,56,57,58,59,60,61,62,63,64,87,88,
 90,91,92,96,97,99]