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 A004222 #12 Oct 24 2023 23:16:09 %S A004222 0,30,47,60,69,77,84,90,95,100,104,107,111,114,117,120,123,125,127, %T A004222 130,132,134,136,138,139,141,143,144,146,147,149,150,151,153,154,155, %U A004222 156,157,159,160,161,162,163,164 %N A004222 a(n) = 100*log_10(n) rounded down. %H A004222 Harvey P. Dale, <a href="/A004222/b004222.txt">Table of n, a(n) for n = 1..1000</a> %F A004222 a(n) = floor(100*log_10(n)). - _Wesley Ivan Hurt_, Mar 15 2023 %t A004222 Floor[100*Log[10,Range[50]]] (* _Harvey P. Dale_, May 12 2012 *) %K A004222 nonn %O A004222 1,2 %A A004222 _N. J. A. Sloane_