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 A008524 #15 Jul 08 2025 01:04:39 %S A008524 1,5,20,53,116,213,360,561,832,1171,1600 %N A008524 Coordination sequence for 4-dimensional lonsdaleite (or wurtzite). %D A008524 M. O'Keeffe, N-dimensional diamond, sodalite and rare sphere packings, Acta Cryst., A 47 (1991), 749-753. %H A008524 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. %Y A008524 For 3-D see A008264. Cf. A008525 etc. %K A008524 nonn,more %O A008524 0,2 %A A008524 _N. J. A. Sloane_ %E A008524 Missing a(1)=5 inserted by _Sean A. Irvine_, Oct 17 2020