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 A230748 #33 May 15 2020 12:59:55 %S A230748 2,3,4,6,7,9,10,12,13,14,16,17,19,20,22,23,25,26,27,29,30,32,33,35,36, %T A230748 38,39,40,42,43,45,46,48,49,50,52,53,55,56,58,59,61,62,63,65,66,68,69, %U A230748 71,72,74,75,76,78,79,81,82,84,85,87,88,89,91,92 %N A230748 Duplicate of A078607. %C A230748 Original definition: a(n) = floor(1/(1-x)) where x^n = 1/2. %K A230748 dead %O A230748 1,1