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 A386466 #9 Jul 28 2025 10:53:55 %S A386466 8,9,6,8,7,7,5,5,1,9,6,0,3,7,2,6,7,8,1,6,5,5,8,5,4,9,2,3,7,6,2,9,1,9, %T A386466 4,5,9,1,2,9,9,6,0,0,6,8,8,5,4,1,0,7,9,7,3,2,6,6,6,2,6,7,3,8,3,1,7,0, %U A386466 0,6,2,6,9,4,5,9,0,7,5,2,4,7,9,4,1,8,1,6,8,0 %N A386466 Decimal expansion of the volume of a parabiaugmented truncated dodecahedron with unit edges. %C A386466 The parabiaugmented truncated dodecahedron is Johnson solid J_69. %C A386466 Also the volume of a metabiaugmented truncated dodecahedron (Johnson solid J_70) with unit edges. %H A386466 Paolo Xausa, <a href="/A386466/b386466.txt">Table of n, a(n) for n = 2..10000</a> %H A386466 Wikipedia, <a href="https://en.wikipedia.org/wiki/Metabiaugmented_truncated_dodecahedron">Metabiaugmented truncated dodecahedron</a>. %H A386466 Wikipedia, <a href="https://en.wikipedia.org/wiki/Parabiaugmented_truncated_dodecahedron">Parabiaugmented truncated dodecahedron</a>. %F A386466 Equals (515 + 251*sqrt(5))/12 = (515 + 251*A002163)/12. %F A386466 Equals A377695 + 2*A179590. %F A386466 Equals the largest root of 36*x^2 - 3090*x - 12445. %e A386466 89.68775519603726781655854923762919459129960068854... %t A386466 First[RealDigits[(515 + 251*Sqrt[5])/12, 10, 100]] (* or *) %t A386466 First[RealDigits[PolyhedronData["J69", "Volume"], 10, 100]] %Y A386466 Cf. A386543 (surface area). %Y A386466 Cf. A002163, A179590, A377695, A385578, A385802, A386464, A386544. %K A386466 nonn,cons,easy %O A386466 2,1 %A A386466 _Paolo Xausa_, Jul 25 2025