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 A381688 #8 Mar 05 2025 09:26:32 %S A381688 8,6,8,4,6,8,0,4,5,7,9,9,8,6,8,3,9,6,9,4,4,4,6,4,4,0,1,4,8,8,9,9,6,8, %T A381688 5,1,1,3,4,1,2,1,0,7,8,8,7,3,1,3,6,5,2,1,8,0,1,3,4,6,7,2,7,6,2,8,1,0, %U A381688 0,3,5,5,4,3,6,2,4,7,5,9,9,1,7,2,3,4,7,2,2,7 %N A381688 Decimal expansion of the isoperimetric quotient of a (small) rhombicuboctahedron. %C A381688 For the definition of isoperimetric quotient of a solid, references and links, see A381684. %H A381688 Paolo Xausa, <a href="/A381688/b381688.txt">Table of n, a(n) for n = 0..10000</a> %F A381688 Equals 36*Pi*A343965^2/(A343964^3). %F A381688 Equals 4*Pi*(43 + 30*sqrt(2))/((9 + sqrt(3))^3) = 4*A000796*(43 + 30*A002193)/((9 + A002194)^3). %e A381688 0.8684680457998683969444644014889968511341210788731... %t A381688 First[RealDigits[4*Pi*(43 + 30*Sqrt[2])/(9 + Sqrt[3])^3, 10, 100]] %Y A381688 Cf. A343964 (surface area), A343965 (volume). %Y A381688 Cf. A000796, A002193, A002194, A381684. %K A381688 nonn,cons,easy %O A381688 0,1 %A A381688 _Paolo Xausa_, Mar 04 2025