# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a180693 Showing 1-1 of 1 %I A180693 #16 Jan 18 2016 03:18:40 %S A180693 1,2197,371293,4826809,51185893014090757,62748517, %T A180693 7056410014866816666030739693,815730721,91733330193268616658399616009, %U A180693 10604499373,112455406951957393129,12646218552730347184269489080961456410641,13,1461920290375446110677,15502932802662396215269535105521 %N A180693 Smallest power of 13 that begins with n. %H A180693 Robert Israel, Table of n, a(n) for n = 1..99 %F A180693 a(n) = 13^A180694(n). - _Michel Marcus_, Jan 18 2016 %p A180693 count:= 1: %p A180693 A[1]:= 1: %p A180693 for n from 1 while count < 99 do %p A180693 x:= 13^n; %p A180693 m:= ilog10(x); %p A180693 for d from 0 to 1 do %p A180693 y:= floor(x/10^(m-d)); %p A180693 if not assigned(A[y]) then %p A180693 count:= count+1; %p A180693 A[y]:= x; %p A180693 fi %p A180693 od %p A180693 od: %p A180693 seq(A[i],i=1..99); # _Robert Israel_, Jan 17 2016 %Y A180693 Cf. A180691, A180694, A180695. %K A180693 base,nonn %O A180693 1,2 %A A180693 _Daniel Mondot_, Sep 18 2010 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE