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 A030501 #7 Apr 02 2020 18:00:20 %S A030501 120,125,130,135,140,145,150,155,160,165,170,175,180,185,190,195,200, %T A030501 205,210,215,220,225,230,235,241,246,251,256,261,266,272,277,283,289, %U A030501 293,299,302,307,313,319,323,329,332,337,343,349,353,359,361,366,371,376 %N A030501 Position of n-th 5 in A030496. %K A030501 nonn %O A030501 1,1 %A A030501 _Clark Kimberling_ %E A030501 a(25) onward corrected by _Sean A. Irvine_, Apr 02 2020