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 A030781 #7 Apr 09 2020 15:24:25 %S A030781 3,6,7,8,9,10,12,15,18,21,24,27,30,32,34,37,41,44,50,54,58,62,65,68, %T A030781 72,78,82,85,90,96,100,106,110,113,117,123,128,134,138,140,145,149, %U A030781 155,161,167,170,174,179,183,190,197,202,208,214,219,226,231,235,241 %N A030781 Record values in A030777. %K A030781 nonn %O A030781 1,1 %A A030781 _Clark Kimberling_ %E A030781 More terms and simpler title from _Sean A. Irvine_, Apr 09 2020