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 A242439 #6 Feb 16 2025 08:33:22 %S A242439 5,3,1,3,3,9,9,4,9,9,5,8,4,2,1,8,2,5,5,9,1,2,4,5,0,9,7,5,5,2,2,5,6,0, %T A242439 4,5,5,3,1,2,7,4,9,5,9,1,6,3,0,1,0,3,4,7,1,2,0,5,2,7,4,3,7,0,3,6,6,9, %U A242439 8,0,5,5,6,3,5,9,1,1,4,1,8,3,7,0,1,4,9,5,4,6,8,6,0,2,0,3,1,8,7,2 %N A242439 Decimal expansion of the coefficient C used in the asymptotic evaluation of the number of primitive Pythagorean triangles with area less than n, as C*sqrt(n). %D A242439 Steven R. Finch, Mathematical Constants, Cambridge University Press, 2003, p. 277. %H A242439 Eric Weisstein's MathWorld, <a href="https://mathworld.wolfram.com/PrimitivePythagoreanTriple.html">Primitive Pythagorean Triple</a> %F A242439 (1/sqrt(2*Pi^5))*GAMMA(1/4)^2. %e A242439 0.531339949958421825591245097552256... %t A242439 RealDigits[1/Sqrt[2*Pi^5]*Gamma[1/4]^2 , 10, 100] // First %Y A242439 Cf. A118858. %K A242439 nonn,cons %O A242439 0,1 %A A242439 _Jean-François Alcover_, May 14 2014