cp's OEIS Frontend

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.

A202283 Decimal expansion of x>0 satisfying x*cosh(2x)=2.

This page as a plain text file.
%I A202283 #9 Feb 07 2025 16:44:07
%S A202283 7,9,0,1,5,0,2,6,1,3,9,4,7,1,6,4,3,9,1,6,1,7,6,8,8,4,8,5,4,4,2,2,1,7,
%T A202283 1,2,3,9,6,1,8,8,5,2,2,0,4,0,4,8,4,8,7,0,8,0,0,3,7,3,8,9,0,7,8,5,9,1,
%U A202283 6,4,9,4,6,9,3,5,4,1,5,5,5,2,7,6,3,4,4,8,3,0,7,1,6,3,0,8,1,2,3
%N A202283 Decimal expansion of x>0 satisfying x*cosh(2x)=2.
%C A202283 See A201939 for a guide to related sequences. The Mathematica program includes a graph.
%H A202283 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A202283 0.79015026139471643916176884854422171239618...
%t A202283 u = 2; v = 2;
%t A202283 f[x_] := x*Cosh[u*x]; g[x_] := v
%t A202283 Plot[{f[x], g[x]}, {x, 0, 1}, {AxesOrigin -> {0, 0}}]
%t A202283 r = x /. FindRoot[f[x] == g[x], {x, .7, .8}, WorkingPrecision -> 110]
%t A202283 RealDigits[r]   (* A202283 *)
%Y A202283 Cf. A201939.
%K A202283 nonn,cons
%O A202283 0,1
%A A202283 _Clark Kimberling_, Dec 15 2011