A227400 Decimal expansion of 5/(3*phi^2) where phi is the golden ratio.

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

Offset: 0

Author

Joost Gielen, Sep 20 2013

Keywords

• nonn
• cons

Comments

An algebraic number of degree 2. - Charles R Greathouse IV, Sep 28 2013

A quadratic number with denominator 2; minimal polynomial 9x^2 -15x + 25. - Charles R Greathouse IV, Apr 21 2016

Examples

			0.6366100187501752529923552760572698037994847...
		

Links

• Index entries for algebraic numbers, degree 2

Programs

Mathematica

RealDigits[5/(3*GoldenRatio^2), 10, 100][[1]] (* Alonso del Arte, Sep 28 2013 *)

PARI

(15-5*sqrt(5))/6 \\ Charles R Greathouse IV, Sep 28 2013

Formula

5/(3*phi^2), with phi = (1 + sqrt(5))/2.