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A136854 as a simple table

na(n)
10
21
310
4100
51000
610000
7100000
8100501
91000000
101005010
1110000000
1210005001
1310050100
14100000000
15100050010
16100501000
171000000000
181000050001
191000500100
201005010000
2110000000000
2210000500010
2310005001000
2410050100000
25100000000000
26100000500001
27100005000100
28100050010000
29100501000000
301000000000000

[0,1,10,100,1000,10000,100000,100501,1000000,
 1005010,10000000,10005001,10050100,100000000,
 100050010,100501000,1000000000,1000050001,
 1000500100,1005010000,10000000000,10000500010,
 10005001000,10050100000,100000000000,100000500001,
 100005000100,100050010000,100501000000,
 1000000000000]