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

0,1

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

Links

Table of n, a(n) for n=0..85.

Index entries for algebraic numbers, degree 2

Formula

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

Example

0.6366100187501752529923552760572698037994847...

Mathematica

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

Prog

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

Crossrefs

Sequence in context: A199186 A176715 A229522 * A137245 A060294 A181171

Adjacent sequences: A227397 A227398 A227399 * A227401 A227402 A227403

Keyword

nonn,cons

Author

Joost Gielen, Sep 20 2013

Status

approved