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 A239683 #29 Jan 31 2025 17:39:14
%S A239683 1,1,2,3,4,4,4,5,5,5,6,6,6,6,6,6,7,7,7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8,
%T A239683 8,8,8,8,8,8,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,10,10,10,
%U A239683 10,10,10,10,10,10,10,10,10,10,10,10,10,10
%N A239683 Number of digits in decimal expansion of n^5.
%F A239683 a(n) = A055642(n^5).
%F A239683 a(n) = k log n + O(1) where k = 2.1714... = 5/log 10. - _Charles R Greathouse IV_, Apr 01 2014
%e A239683 a(1) = 1 because 1^5 = 1, which has only 1 digit.
%e A239683 a(5) = 4 because 5^5 = 3125, which has 4 digits.
%t A239683 Join[{1},IntegerLength[Range[80]^5]] (* _Harvey P. Dale_, Jan 31 2025 *)
%o A239683 (PARI) vector(110,n,#digits(n^5)) \\ _Joerg Arndt_, Mar 24 2014
%Y A239683 Cf. A000584.
%K A239683 nonn,base,easy
%O A239683 0,3
%A A239683 _Lorianne Kwak_, Mar 24 2014