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 A005889 M2203 #18 Jul 08 2025 16:38:08 %S A005889 3,0,6,3,0,6,6,0,18,0,0,6,6,0,24,3,0,6,12,0,24,6,0,6,15,0,18,6,0,12, %T A005889 18,0,24,6,0,18,18,0,36,0,0,0,12,0,36,12,0,6,21,0,48,6,0,18,12,0,36,0, %U A005889 0,24,18,0,36,3,0,12 %N A005889 Theta series of hexagonal close-packing with respect to triangle between octahedra. %D A005889 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A005889 N. J. A. Sloane and B. K. Teo, <a href="http://dx.doi.org/10.1063/1.449551">Theta series and magic numbers for close-packed spherical clusters</a>, J. Chem. Phys. 83 (1985) 6520-6534. %K A005889 nonn %O A005889 1,1 %A A005889 _N. J. A. Sloane_