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A171816 as a simple table

na(n)
09
18
27
36
45
54
63
72
81
910
10100
111000
1210000
13100000
141000000
1510000000
16100000000
171000000000
1810000000000
19100000000000
201000000000000
2110000000000000
22100000000000000
231000000000000000
2410000000000000000
25100000000000000000
261000000000000000000
2710000000000000000000

[9,8,7,6,5,4,3,2,1,10,100,1000,10000,100000,
 1000000,10000000,100000000,1000000000,10000000000,
 100000000000,1000000000000,10000000000000,
 100000000000000,1000000000000000,
 10000000000000000,100000000000000000,
 1000000000000000000,10000000000000000000]