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A171766 as a simple table

na(n)
017
1737
270307
37003007
4700030007
570000300007
67000003000007
7700000030000007
870000000300000007
97000000003000000007
10700000000030000000007
1170000000000300000000007
127000000000003000000000007
13700000000000030000000000007
1470000000000000300000000000007

[17,737,70307,7003007,700030007,70000300007,
 7000003000007,700000030000007,70000000300000007,
 7000000003000000007,700000000030000000007,
 70000000000300000000007,7000000000003000000000007,
 700000000000030000000000007,
 70000000000000300000000000007]