A245670 Decimal expansion of 28*sqrt(3) - 48.

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

Offset

0,1

Comments

Construct the largest possible square inside a given equilateral triangle. This constant is the ratio of the area of the square to the area of the triangle.

Links

Table of n, a(n) for n=0..104.

Formula

28*sqrt(3) - 48 = 28*A002194 - 48.

Example

0.4974226119285642187684975621644262743985...

Mathematica

RealDigits[28*Sqrt[3]-48, 10, 120][[1]] (* Harvey P. Dale, Oct 14 2015 *)

Prog

(PARI)
default(realprecision, 120);
28*sqrt(3)-48

Crossrefs

Cf. A002194.

Sequence in context: A216676 A021909 A018880 * A166923 A021205 A296425

Adjacent sequences: A245667 A245668 A245669 * A245671 A245672 A245673

Keyword

cons,nonn

Author

Rick L. Shepherd, Jul 28 2014

Status

approved