A201399 Decimal expansion of x satisfying x^2 + 4 = sec(x) and 0 < x < Pi.

1, 4, 0, 2, 4, 0, 6, 0, 3, 1, 2, 7, 6, 5, 1, 6, 4, 7, 2, 8, 6, 3, 7, 6, 5, 8, 5, 4, 6, 9, 3, 9, 7, 3, 0, 3, 2, 3, 0, 5, 2, 3, 1, 8, 9, 3, 8, 7, 0, 0, 8, 1, 0, 9, 3, 8, 2, 9, 8, 9, 9, 6, 6, 5, 5, 8, 2, 5, 2, 7, 7, 7, 8, 3, 4, 2, 4, 3, 5, 0, 8, 4, 7, 5, 7, 8, 1, 8, 5, 1, 9, 3, 9, 3, 4, 9, 5, 5, 5

Offset: 1

Author

Clark Kimberling, Dec 01 2011

Keywords

• nonn
• cons

Comments

See A201397 for a guide to related sequences. The Mathematica program includes a graph.

Examples

			1.40240603127651647286376585469397303230523...
		

Links

• Index entries for transcendental numbers.

Crossrefs

Cf. A201397.

Programs

Mathematica

a = 1; c = 4;
f[x_] := a*x^2 + c; g[x_] := Sec[x]
Plot[{f[x], g[x]}, {x, 0, Pi}, {AxesOrigin -> {0, 0}}]
r = x /. FindRoot[f[x] == g[x], {x, 1.4, 1.5}, WorkingPrecision -> 110]
RealDigits[r]   (* A201399 *)