This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A164103 #19 Feb 16 2025 08:33:11 %S A164103 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, %T A164103 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, %U A164103 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 %N A164103 Decimal expansion of 8*Pi^2/15. %C A164103 Volume of the 5-dimensional unit sphere. %C A164103 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 %D A164103 David Wells, The Penguin Dictionary of Curious and Interesting Numbers. Penguin Books, NY, 1986, Revised edition 1987. See p. 67. %H A164103 G. C. Greubel, <a href="/A164103/b164103.txt">Table of n, a(n) for n = 1..10000</a> %H A164103 Eric Weisstein, <a href="https://mathworld.wolfram.com/Hypersphere.html">Hypersphere</a>, Wolfram Mathworld. %H A164103 Wikipedia, <a href="http://en.wikipedia.org/wiki/Hypersphere">Hypersphere</a>. %H A164103 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>. %F A164103 Equals A164104/5 = 4*A164102/15. %e A164103 Equals 5.2637890139143245967117285332672806... %t A164103 RealDigits[8*Pi^2/15, 10, 100][[1]] (* _G. C. Greubel_, Apr 09 2017 *) %o A164103 (PARI) 8*Pi^2/15 \\ _G. C. Greubel_, Apr 09 2017 %K A164103 cons,nonn %O A164103 1,1 %A A164103 _R. J. Mathar_, Aug 10 2009