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 A004224 #13 Oct 25 2023 07:40:56 %S A004224 0,31,48,61,70,78,85,91,96,100,105,108,112,115,118,121,124,126,128, %T A004224 131,133,135,137,139,140,142,144,145,147,148,150,151,152,154,155,156, %U A004224 157,158,160,161,162,163,164,165 %N A004224 a(n) = 100*log_10(n) rounded up. %t A004224 Ceiling[100 Log10[Range[50]]] (* _Harvey P. Dale_, Jun 05 2021 *) %Y A004224 Cf. A004222, A004223. %Y A004224 Cf. A004218, A004221, A004227, A004230. %K A004224 nonn %O A004224 1,2 %A A004224 _N. J. A. Sloane_