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 A128112 #3 Feb 16 2025 08:33:04 %S A128112 0,0,0,1,1,1,3,3,3,4,3,10,5,7,6,7,4,11,8,12,9,8,6,16,11,13,10,14,9,10, %T A128112 14,19,15,13,10,19,12,11,18,21,12,16,20,20,21,16,12,26,23,14,21,25,16, %U A128112 22,26,21,20,20,18,33,29,18,30,35,18,27,24,23,33,26,22,28,35,20,36,42 %N A128112 Number of uniform polyhedra with n faces. %H A128112 Hart, George W., <a href="http://www.georgehart.com/virtual-polyhedra/uniform-info.html">Uniform Polyhedra</a>. %H A128112 Maeder, Roman E., <a href="http://www.mathconsult.ch/showroom/unipoly/unipoly.html">Uniform Polyhedra</a>. %H A128112 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/UniformPolyhedron.html">Uniform Polyhedron.</a> %F A128112 After 124th term, a(n) equals A055684(n-2) + 1 for n odd and A055684(n-2) + A055684(n/2-1) + A128115(n/2-1) + 2 for n even. %e A128112 a(20)=12 because there are the icosahedron, the small cubicuboctahedron, the great cubicuboctahedron, the cubitruncated cuboctahedron, the great icosahedron, the octadecagonal prism, two octadecagrammic (18/5 and 18/7) prisms, the enneagonal antiprism, two enneagrammic (9/2 and 9/4) antiprisms and the enneagrammic crossed antiprism. %Y A128112 Cf. A128113, A128114. %K A128112 nonn %O A128112 1,7 %A A128112 Paulo de A. Sachs (sachs6(AT)yahoo.de), Feb 15 2007, corrected Feb 15 2007