A179047 Decimal expansion of 9*sqrt(3)/4, the area of an equilateral triangle of side length 3.

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

Offset

1,1

Links

Table of n, a(n) for n=1..105.

Index entries for algebraic numbers, degree 2.

Example

3.89711431702997391043675426838821282562131182107335641312556570376684...

Mathematica

a=b=c=3; area=Sqrt[(a+b-c)*(a-b+c)*(-a+b+c)*(a+b+c)]/4; RealDigits[N[area, 200]]
RealDigits[9 Sqrt[3]/4, 10, 120][[1]] (* Harvey P. Dale, Apr 27 2025 *)

Prog

(PARI) 9*sqrt(3)/4 \\ Charles R Greathouse IV, May 18 2026

Crossrefs

Cf. A002194, A010502, A120011.

Sequence in context: A021882 A388511 A079591 * A185067 A397027 A256955

Adjacent sequences: A179044 A179045 A179046 * A179048 A179049 A179050

Keyword

nonn,cons,easy

Author

Vladimir Joseph Stephan Orlovsky, Jun 26 2010

Status

approved