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A094888 Decimal expansion of 2*Pi*phi, where phi = (1+sqrt(5))/2. 1
1, 0, 1, 6, 6, 4, 0, 7, 3, 8, 4, 6, 3, 0, 5, 1, 9, 6, 3, 1, 6, 1, 9, 0, 1, 8, 0, 2, 6, 4, 8, 4, 3, 9, 7, 6, 8, 3, 6, 6, 3, 6, 7, 8, 5, 8, 6, 4, 4, 2, 3, 0, 8, 2, 4, 0, 9, 6, 4, 6, 6, 5, 6, 1, 8, 4, 9, 9, 9, 5, 8, 2, 8, 6, 9, 0, 5, 3, 9, 7, 2, 0, 3, 7, 3, 2, 1, 7, 7, 2, 4, 0, 7, 0, 7, 8, 8, 4, 3 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

2,4

LINKS

Ivan Panchenko, Table of n, a(n) for n = 2..1000

FORMULA

From Peter Bala, Nov 03 2019: (Start)

Equals 10*Integral_{x = 0..inf} cosh(4*x)/cosh(5*x) dx = Integral_{x = 0..1} (1 + x^8)/(1 + x^10) dx .

Equals 100*Sum_{n >= 0} (-1)^n*(2*n + 1)/( (10*n + 1)*(10*n + 9) ). (End)

EXAMPLE

10.16640738463051963...

CROSSREFS

Sequence in context: A143937 A019133 A214581 * A159702 A255188 A164510

Adjacent sequences:  A094885 A094886 A094887 * A094889 A094890 A094891

KEYWORD

cons,nonn

AUTHOR

N. J. A. Sloane, Jun 15 2004

STATUS

approved

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Last modified August 9 01:18 EDT 2020. Contains 336310 sequences. (Running on oeis4.)