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 A008525 #11 Jul 08 2025 01:04:45 %S A008525 1,6,30,96,252,546,1070,1901,3172,4971,7490 %N A008525 Coordination sequence for 5-dimensional lonsdaleite. %D A008525 M. O'Keeffe, N-dimensional diamond, sodalite and rare sphere packings, Acta Cryst., A 47 (1991), 749-753. %H A008525 M. O'Keeffe, <a href="http://dx.doi.org/10.1107/S0108767391006633">N-dimensional diamond, sodalite and rare sphere packings</a>, Acta Cryst., A 47 (1991), 749-753. %K A008525 nonn,more %O A008525 0,2 %A A008525 _N. J. A. Sloane_ %E A008525 Missing a(1)=6 inserted by _Sean A. Irvine_, Oct 17 2020