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 A385804 #10 Jul 13 2025 07:21:26 %S A385804 8,5,6,7,6,2,7,4,5,7,8,1,2,1,0,5,6,8,0,7,6,7,2,0,0,6,2,8,8,7,1,1,4,2, %T A385804 9,4,1,4,5,1,1,5,9,4,2,4,2,7,1,6,1,0,7,3,3,0,0,7,9,3,2,3,3,5,1,4,4,7, %U A385804 2,6,7,3,5,5,7,0,8,8,4,1,8,6,4,0,2,0,2,7,0,1 %N A385804 Decimal expansion of the volume of a triaugmented dodecahedron with unit edge. %C A385804 The triaugmented dodecahedron is Johnson solid J_61. %H A385804 Paolo Xausa, <a href="/A385804/b385804.txt">Table of n, a(n) for n = 1..10000</a> %H A385804 Wikipedia, <a href="https://en.wikipedia.org/wiki/Triaugmented_dodecahedron">Triaugmented dodecahedron</a>. %F A385804 Equals (5/8)*(7 + 3*sqrt(5)) = (5/8)*(7 + A010499). %F A385804 Equals A102769 + 3*A179552. %F A385804 Equals the largest root of 16*x^2 - 140*x + 25. %F A385804 Equals A377697^2. - _Hugo Pfoertner_, Jul 13 2025 %e A385804 8.56762745781210568076720062887114294145115942427... %t A385804 First[RealDigits[5/8*(7 + Sqrt[45]), 10, 100]] (* or *) %t A385804 First[RealDigits[PolyhedronData["J61", "Volume"], 10, 100]] %Y A385804 Cf. A385805 (surface area). %Y A385804 Cf. A010499, A102769, A179552, A377697, A385695, A385802. %K A385804 nonn,cons,easy %O A385804 1,1 %A A385804 _Paolo Xausa_, Jul 09 2025