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A171460 as a simple table

na(n)
00
11
22
33
4100
5111
6112
7113
8200
9211
10222
11223
12300
13311
14322
15333
1610000
1710101
1810102
1910103
2011100
2111111
2211112
2311113
2411200
2511211
2611222
2711223
2811300
2911311
3011322
3111333
3220000
3320101
3420202
3520203
3621100
3721111
3821212
3921213

[0,1,2,3,100,111,112,113,200,211,222,223,300,311,
 322,333,10000,10101,10102,10103,11100,11111,11112,
 11113,11200,11211,11222,11223,11300,11311,11322,
 11333,20000,20101,20202,20203,21100,21111,21212,
 21213]