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 A128113 #8 Feb 16 2025 08:33:04 %S A128113 0,0,0,0,0,1,0,0,1,0,0,3,0,0,2,1,0,2,0,3,3,0,0,6,0,0,3,4,0,8,0,3,5,0, %T A128113 0,9,0,0,6,2,0,3,0,7,4,0,0,13,0,0,8,8,0,3,0,4,9,0,0,22,0,0,6,5,0,5,0, %U A128113 11,11,0,0,11,0,0,10,12,0,6,0,6,9,0,0,14,0,0,14,6,0,10,0,15,15,0,0,13,0,0 %N A128113 Number of uniform polyhedra with n edges. %H A128113 Hart, George W., <a href="http://www.georgehart.com/virtual-polyhedra/uniform-info.html">Uniform Polyhedra</a>. %H A128113 Maeder, Roman E., <a href="http://www.mathconsult.ch/showroom/unipoly/unipoly.html">Uniform Polyhedra</a>. %H A128113 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/UniformPolyhedron.html">Uniform Polyhedron.</a> %F A128113 After 240th term, a(n) equals the sum between [A055684(n/3) + 1 for n != 0 mod 3, otherwise 0] and [A055684(n/4) + A128115(n/4) + 1 for n != 0 mod 4, otherwise 0]. %e A128113 The first nonzero term, a(6)=1, represents the polyhedron with least edges: the tetrahedron. There is no polyhedron with 7 edges and no polyhedron with 8 edges is uniform, a(9)=1 represents the triangular prism, the next nonzero term, a(12), is 3 because there are the tetrahemihexahedron, the cube and the octahedron. %Y A128113 Cf. A128112, A128114. %K A128113 nonn %O A128113 1,12 %A A128113 Paulo de A. Sachs (sachs6(AT)yahoo.de), Feb 15 2007, corrected Feb 15 2007