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 A201400 #10 Jan 30 2025 15:32:48
%S A201400 1,4,2,8,2,6,7,7,6,5,8,3,8,2,2,2,6,4,0,3,3,9,7,6,6,3,0,1,3,2,5,2,7,7,
%T A201400 6,0,6,6,2,8,1,3,1,0,7,4,1,3,2,3,8,0,7,8,8,4,1,0,0,4,1,5,6,5,2,4,2,1,
%U A201400 0,7,6,0,2,9,0,4,3,2,9,3,4,0,3,3,3,5,3,6,2,7,9,5,1,4,8,7,2,6,6
%N A201400 Decimal expansion of x satisfying x^2 + 5 = sec(x) and 0 < x < Pi.
%C A201400 See A201397 for a guide to related sequences. The Mathematica program includes a graph.
%H A201400 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A201400 1.42826776583822264033976630132527760662...
%t A201400 a = 1; c = 5;
%t A201400 f[x_] := a*x^2 + c; g[x_] := Sec[x]
%t A201400 Plot[{f[x], g[x]}, {x, 0, Pi}, {AxesOrigin -> {0, 0}}]
%t A201400 r = x /. FindRoot[f[x] == g[x], {x, 1.4, 1.5}, WorkingPrecision -> 110]
%t A201400 RealDigits[r] (* A201400 *)
%Y A201400 Cf. A201397.
%K A201400 nonn,cons
%O A201400 1,2
%A A201400 _Clark Kimberling_, Dec 01 2011