A179048 Decimal expansion of 25*sqrt(3)/4, the area of the equilateral triangle of side 5.

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

Offset

2,3

Links

Table of n, a(n) for n=2..106.

Formula

Equals 25*A002194/4.

Example

10.825317547305483084546539634411702293392532836314878925348793621574581355680..

Mathematica

a=b=c=5; area=Sqrt[(a+b-c)*(a-b+c)*(-a+b+c)*(a+b+c)]/4; RealDigits[N[area, 200]]
RealDigits[(25*Sqrt[3])/4, 10, 120][[1]] (* Harvey P. Dale, May 30 2018 *)

Prog

(PARI) 25*sqrt(3)/4 \\ Charles R Greathouse IV, Jun 30 2011

Crossrefs

Cf. A002194, A010502, A120011, A179047.

Sequence in context: A284157 A201583 A243370 * A173158 A020787 A179954

Adjacent sequences: A179045 A179046 A179047 * A179049 A179050 A179051

Keyword

nonn,cons,easy

Author

Vladimir Joseph Stephan Orlovsky, Jun 26 2010

Extensions

Offset corrected, keyword:cons inserted - R. J. Mathar, Jun 28 2010

Status

approved