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 A386459 #12 Jul 24 2025 05:25:05 %S A386459 1,5,5,4,2,4,7,2,3,3,2,6,5,6,5,0,6,9,2,6,9,4,2,3,3,9,8,6,2,4,5,1,7,2, %T A386459 3,0,8,5,7,0,4,9,1,6,6,6,8,6,7,7,0,5,6,3,9,0,2,7,5,6,2,5,2,6,9,2,8,3, %U A386459 9,0,6,5,5,1,7,9,7,9,0,4,2,0,7,2,0,2,0,6,6,8 %N A386459 Decimal expansion of the volume of an augmented truncated cube with unit edges. %C A386459 The augmented truncated cube is Johnson solid J_66. %H A386459 Paolo Xausa, <a href="/A386459/b386459.txt">Table of n, a(n) for n = 2..10000</a> %H A386459 Wikipedia, <a href="https://en.wikipedia.org/wiki/Augmented_truncated_cube">Augmented truncated cube</a>. %F A386459 Equals 8 + 16*sqrt(2)/3 = 8 + 16*A131594. %F A386459 Equals A377299 + A179587. %F A386459 Equals the largest root of 9*x^2 - 144*x + 64. %e A386459 15.5424723326565069269423398624517230857049... %t A386459 First[RealDigits[8 + 16*Sqrt[2]/3, 10, 100]] (* or *) %t A386459 First[RealDigits[PolyhedronData["J66", "Volume"], 10, 100]] %Y A386459 Cf. A386460 (surface area). %Y A386459 Cf. A131594, A179587, A377299, A386411. %K A386459 nonn,cons,easy %O A386459 2,2 %A A386459 _Paolo Xausa_, Jul 22 2025