This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A210436 #25 Sep 08 2022 08:46:01
%S A210436 1,1,2,3,4,4,5,6,7,8,8,9,10,11,11,12,13,14,15,15,16,17,18,18,19,20,21,
%T A210436 22,22,23,24,25,25,26,27,28,29,29,30,31,32,32,33,34,35,36,36,37,38,39,
%U A210436 39,40,41,42,43,43,44,45,46,46,47,48,49,50,50,51,52,53
%N A210436 Number of digits in 6^n.
%H A210436 Alois P. Heinz, <a href="/A210436/b210436.txt">Table of n, a(n) for n = 0..1000</a>
%F A210436 a(n) = A055642(A000400(n)) = A055642(6^n) = floor(log_10(10*(6^n))). - _Jonathan Vos Post_, Mar 23 2012
%e A210436 a(4) = 4 because 6^4 = 1296, which has 4 digits.
%e A210436 a(5) = 4 because 6^5 = 7776, which has 4 digits.
%p A210436 a:= n-> length(6^n): seq (a(n), n=0..100); # _Alois P. Heinz_, Mar 22 2012
%t A210436 Table[Length[IntegerDigits[6^n]], {n, 0, 99}] (* _Alonso del Arte_, Mar 22 2012 *)
%o A210436 (Magma) [#Intseq(6^n): n in [0..67]]; // _Bruno Berselli_, Mar 22 2012
%Y A210436 Cf. A000400, A034887, A034888, A210062, A210434, A210435.
%K A210436 nonn,base,easy
%O A210436 0,3
%A A210436 _Luc Comeau-Montasse_, Mar 21 2012