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 A006030 #5 Aug 11 2024 14:41:29 %S A006030 1,4,969,1771,6378736 %N A006030 Palindromic tetrahedral numbers. %H A006030 P. De Geest, <a href="https://www.worldofnumbers.com/tetra.htm">Palindromic Tetrahedrals</a> %Y A006030 Cf. A006029. %K A006030 nonn,base %O A006030 1,2 %A A006030 _Patrick De Geest_