OFFSET
2,1
COMMENTS
Surface area of the 8-dimensional unit sphere.
LINKS
G. C. Greubel, Table of n, a(n) for n = 2..5000
Eric Weisstein's World of Mathematics, Hypersphere.
Wikipedia, Hypersphere
Ce Xu and Jianqiang Zhao, Sun's Three Conjectures on Apéry-like Sums Involving Harmonic Numbers, arXiv:2203.04184 [math.NT], 2022.
EXAMPLE
Equals 32.4696970113341457454801108962350370832425285..
MATHEMATICA
RealDigits[Pi^4/3, 10, 120][[1]] (* Harvey P. Dale, Jul 31 2014 *)
PROG
(PARI) Pi^4/3 \\ G. C. Greubel, Sep 11 2017
CROSSREFS
KEYWORD
cons,nonn
AUTHOR
R. J. Mathar, Aug 10 2009
STATUS
approved