A197588 Decimal expansion of the maximum of (cos(x))^2+(sin(3x))^2.

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

Offset

1,2

Comments

For a discussion and guide to related sequences, see A197739.

Links

Table of n, a(n) for n=1..99.

Index entries for algebraic numbers, degree 2.

Formula

Minimal polynomial: 27*x^2 - 54*x + 11. - Amiram Eldar, Jun 06 2026

Example

1.7698003589195010193455317073359432741968023...

Mathematica

(See the program at A197739.)
(* Alternative: *)
RealDigits[1 + 4/(3*Sqrt[3]), 10, 99] // First (* Jean-François Alcover, Feb 27 2013 *)

Prog

(PARI) 1 + 4/(3*sqrt(3)) \\ Stefano Spezia, May 03 2025

Crossrefs

Cf. A197739.

Sequence in context: A200106 A201766 A307951 * A021569 A085964 A383647

Adjacent sequences: A197585 A197586 A197587 * A197589 A197590 A197591

Keyword

nonn,cons,changed

Author

Clark Kimberling, Oct 18 2011

Status

approved