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Numbers k such that 5^k starts with k.
7

%I #4 Apr 10 2023 15:17:50

%S 2,7,19,67,602,1189,3028,48076,5778508,7409478,269801494

%N Numbers k such that 5^k starts with k.

%Y For k such that b^k starts with n, for b = 2,..., 9, see A100129, A362096, A320930, A362097-A362101.

%K nonn,base,more

%O 1,1

%A _N. J. A. Sloane_, Apr 10 2023, based on an email from _Keith F. Lynch_.