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A007961 as a simple table

na(n)
11
22
33
410
511
612
713
820
9100
10101
11102
12103
13110
14111
15112
161000
171001
181002
191003
201010
211011
221012
231013
241020
2510000
2610001
2710002
2810003
2910010
3010011
3110012
3210013
3310020
3410100
3510101
36100000
37100001
38100002
39100003
40100010
41100011

[1,2,3,10,11,12,13,20,100,101,102,103,110,111,112,
 1000,1001,1002,1003,1010,1011,1012,1013,1020,
 10000,10001,10002,10003,10010,10011,10012,10013,
 10020,10100,10101,100000,100001,100002,100003,
 100010,100011]