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A196662 as a simple table

na(n)
01
17
270
3700
47000
570000
6700000
77000000
870000000
9700000000
107000000000
1170000000000
12700000000000
137000000000000
1470000000000000
15700000000000000
167000000000000000
1770000000000000000
18700000000000000000
197000000000000000000
2070000000000000000000

[1,7,70,700,7000,70000,700000,7000000,70000000,
 700000000,7000000000,70000000000,700000000000,
 7000000000000,70000000000000,700000000000000,
 7000000000000000,70000000000000000,
 700000000000000000,7000000000000000000,
 70000000000000000000]