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A215940 as a simple table

na(n)
10
21
310
412
521
622
7100
8101
9120
10123
11131
12133
13210
14212
15220
16223
17242
18243
19321
20322
21331
22333
23342
24343
251000
261001
271010
281012
291021
301022
311200
321201
331230
341234
351241
361244
371310
381312
391330
401334
411352
421354
431421
441422
451441
461444
471452
481454
492100

[0,1,10,12,21,22,100,101,120,123,131,133,210,212,
 220,223,242,243,321,322,331,333,342,343,1000,1001,
 1010,1012,1021,1022,1200,1201,1230,1234,1241,1244,
 1310,1312,1330,1334,1352,1354,1421,1422,1441,1444,
 1452,1454,2100]