A296182 - OEIS

A296182

Decimal expansion of (2 + phi)/2, with the golden section phi from A001622.

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

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OFFSET

1,2

COMMENTS

In a regular pentagon this is the distance between a vertex and the midpoint of the opposite side in units of the radius of the circumscribing circle.

LINKS

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

FORMULA

Equals (2 + phi)/2 = (5 + sqrt(5))/4 = (2*phi - 1)*phi/2 = with phi from A001622.

Equals 1 + A019863.

EXAMPLE

1.809016994374947424102293417182819058860154589902881431067724311352630231409451...

MATHEMATICA

RealDigits[(5 + Sqrt[5])/4, 10, 111][[1]] (* Robert G. Wilson v, Jan 14 2018 *)

PROG

(PARI) (5 + sqrt(5))/4 \\ Michel Marcus, Jan 08 2018

CROSSREFS