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A173480 as a simple table

na(n)
19
290
3900
49000
590000
6900000
77000000
890000000
9900000000
1090000000000
110
12900000000000
130
1470000000000000
15900000000000000

[9,90,900,9000,90000,900000,7000000,90000000,
 900000000,90000000000,0,900000000000,0,
 70000000000000,900000000000000]