A134944 Decimal expansion of (1 + sqrt(5))/8, the golden ratio divided by 4.

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

Offset: 0

Author

Omar E. Pol, Nov 15 2007

Keywords

• cons
• nonn
• easy

Comments

Area of quadrilateral with side lengths (sqrt(5)+1)/4, (sqrt(5)-1)/4, 1/2, 1. [And what angles? - N. J. A. Sloane, Apr 28 2024]

Examples

			0.404508497187...
		

Links

• Index entries for algebraic numbers, degree 2.

Crossrefs

Cf. A001622, A019863.

Programs

Maple

Digits:=100: evalf((1+sqrt(5))/8); # Wesley Ivan Hurt, Sep 08 2014

Mathematica

RealDigits[(1 + Sqrt[5])/8, 10, 100][[1]] (* Wesley Ivan Hurt, Sep 08 2014 *)

PARI

a(n)=floor(10^n*(1+sqrt(5))/8)%10 \\ Edward Jiang, Sep 07 2014

Extensions

Edited by N. J. A. Sloane, Apr 28 2024