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%I #15 Jul 23 2024 21:03:54
%S 8,27,33,33,274,2076,5173,8880,67390,206131,864271,1291676,5756979,
%T 13654248,73000220
%N Least power of 3 having a run of exactly n consecutive 5's in its decimal representation.
%e a(3) = 33 because 3^33 = 5559060566555523 is the smallest power of 3 that contains a run of exactly 3 consecutive 5's in its decimal form. (3^33 happens to contain also a run of exactly 4 consecutive 5's, so a(4) is also 33.)
%Y Cf. A195269, A131552, A131551, A131550, A131549, A131547, A131546, A131545, A131544.
%K more,nonn,base
%O 1,1
%A _Shyam Sunder Gupta_, Aug 26 2007
%E a(11)-a(14) from _Lars Blomberg_, Feb 02 2013
%E a(15) from _Bert Dobbelaere_, Mar 05 2019
%E a(3) corrected by _Pontus von Brömssen_, Jul 21 2024