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 A386461 #6 Jul 24 2025 05:25:22 %S A386461 3,6,2,4,1,9,1,1,7,2,9,2,6,0,2,6,9,5,6,4,5,2,3,2,9,5,1,5,9,7,0,1,0,7, %T A386461 4,0,9,6,3,2,8,5,9,6,0,1,8,2,5,7,1,0,7,0,9,7,6,3,6,6,6,5,8,2,1,7,3,3, %U A386461 5,9,1,8,9,5,3,3,2,0,5,6,4,5,9,1,2,7,6,8,5,0 %N A386461 Decimal expansion of the surface area of a biaugmented truncated cube with unit edges. %C A386461 The biaugmented truncated cube is Johnson solid J_67. %H A386461 Paolo Xausa, <a href="/A386461/b386461.txt">Table of n, a(n) for n = 2..10000</a> %H A386461 Wikipedia, <a href="https://en.wikipedia.org/wiki/Biaugmented_truncated_cube">Biaugmented truncated cube</a>. %F A386461 Equals 2*(9 + 4*sqrt(2) + 2*sqrt(3)) = 2*(9 + A010487 + A010469) = 18 + A377342 + A010502. %F A386461 Equals the largest root of x^4 - 72*x^3 + 1592*x^2 - 10656*x - 2672. %e A386461 36.241911729260269564523295159701074096328596018257... %t A386461 First[RealDigits[18 + 8*Sqrt[2] + Sqrt[48], 10, 100]] (* or *) %t A386461 First[RealDigits[PolyhedronData["J67", "SurfaceArea"], 10, 100]] %Y A386461 Cf. A010524 (volume - 9). %Y A386461 Cf. A010469, A010487, A010502, A377342, A385535, A386460. %K A386461 nonn,cons,easy %O A386461 2,1 %A A386461 _Paolo Xausa_, Jul 23 2025