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 A024806 #7 Jul 23 2019 22:38:03 %S A024806 1,3,5,7,9,11,13,15,16,19,21,23,24,27,30,31,33,36,37,39,41,44,46,48, %T A024806 50,51,53,55,59,61,63,65,67,70,71,73,76,78,79,81,82,84,87,88,90,92,93, %U A024806 95,97,98,100,102,103,105,108,110,112,114,115,117,120,121,123,126,128,130,132,134,136 %N A024806 Positions of even numbers in A004432. %K A024806 nonn %O A024806 1,2 %A A024806 _Clark Kimberling_ %E A024806 a(58) onward corrected by _Sean A. Irvine_, Jul 23 2019