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 A030387 #10 Apr 01 2020 01:47:05 %S A030387 0,4,12,20,28,29,32,35,38,40,52,64,76,77,80,83,86,88,100,112,124,125, %T A030387 128,131,134,136,148,160,172,173,174,177,178,181,182,185,186,188,190, %U A030387 194,198,202,204,206,210,214,218,220,222,226,230 %N A030387 Position of n-th 0 in A030386. %K A030387 nonn,base %O A030387 1,2 %A A030387 _Clark Kimberling_ %E A030387 Initial 0 inserted for consistency with change in A030386 by _Sean A. Irvine_, Mar 31 2020