Table of n, a(n) for n=1..12.
235711 is divisible by 7, and only at the concatenation through 601 is such a number divisible by 7^2.
Cf. A183194 and immediately following entries.
Sequence in context: A288326 A260583 A079915 * A142738 A262015 A275572
Adjacent sequences: A185653 A185654 A185655 * A185657 A185658 A185659
James G. Merickel, Feb 01 2011
a(12) added by James G. Merickel, Mar 29 2013