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 A093821 #9 Feb 16 2025 08:32:53 %S A093821 8,4,5,2,9,9,4,6,1,6,2,0,7,4,8,4,7,0,9,8,1,7,0,2,4,3,8,9,9,6,0,8,5,0, %T A093821 8,8,7,0,4,7,9,6,4,9,7,4,5,9,7,4,6,2,4,7,9,6,2,7,9,5,3,4,7,0,3,2,0,4, %U A093821 4,6,5,5,3,9,4,1,3,3,3,0,8,6,1,2,5,6,9,2,0,8,8,2,8,5,0,0,9,4,9,5,4,9 %N A093821 Decimal expansion of (2*(3 - sqrt(3)))/3. %C A093821 Area of lamina found by Pal in the Lebesgue minimal problem. %C A093821 This appears also as the ratio r_3/r_4 of the outer radii of a regular triangle circumscribed by a regular quadrangle such that they share one vertex and the other two vertices of the triangle touch two sides of the quadrangle. The center of the quadrangle is displaced from the center of the triangle by d/r_4 = 1-2/sqrt(3) = 0.154700.. (see A020832). # _R. J. Mathar_, Jan 22 2013 %H A093821 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/LebesgueMinimalProblem.html">Lebesgue Minimal Problem</a> %e A093821 0.845299461... %p A093821 evalf(2*(1-1/sqrt(3))) ; # _R. J. Mathar_, Jan 22 2013 %Y A093821 Cf. A010527, A093822. %K A093821 nonn,cons,easy %O A093821 0,1 %A A093821 _Eric W. Weisstein_, Apr 16 2004