A164103 Decimal expansion of 8*Pi^2/15.

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

Offset: 1

Author

R. J. Mathar, Aug 10 2009

Keywords

• cons
• nonn

Comments

Volume of the 5-dimensional unit sphere.

For all nonnegative integers n, let V_n be the volume of the n-dimensional unit sphere. If n != 5, then V_n < V_5, this constant (see A072345). - Rick L. Shepherd, Feb 23 2014

Examples

			Equals 5.2637890139143245967117285332672806...
		

References

• David Wells, The Penguin Dictionary of Curious and Interesting Numbers. Penguin Books, NY, 1986, Revised edition 1987. See p. 67.

Links

• G. C. Greubel, Table of n, a(n) for n = 1..10000
• Eric Weisstein, Hypersphere, Wolfram Mathworld.
• Wikipedia, Hypersphere.
• Index entries for transcendental numbers.

Programs

Mathematica

RealDigits[8*Pi^2/15, 10, 100][[1]] (* G. C. Greubel, Apr 09 2017 *)

PARI

8*Pi^2/15 \\ G. C. Greubel, Apr 09 2017

Formula

Equals A164104/5 = 4*A164102/15.