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A296182 Decimal expansion of (2 + phi)/2, with the golden section phi from A001622. 3
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 (list; constant; graph; refs; listen; history; text; internal format)
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

Cf. A001622, A019863.

Sequence in context: A076350 A197617 A005076 * A019863 A243456 A246772

Adjacent sequences:  A296179 A296180 A296181 * A296183 A296184 A296185

KEYWORD

nonn,cons,easy

AUTHOR

Wolfdieter Lang, Jan 08 2018

STATUS

approved

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Last modified November 24 10:48 EST 2020. Contains 338612 sequences. (Running on oeis4.)