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 A164104 #10 Feb 16 2025 08:33:11 %S A164104 2,6,3,1,8,9,4,5,0,6,9,5,7,1,6,2,2,9,8,3,5,5,8,6,4,2,6,6,6,3,3,6,4,0, %T A164104 3,0,2,7,5,0,3,1,9,8,4,1,9,3,0,8,7,7,5,0,0,3,7,6,8,9,3,1,6,6,9,9,2,0, %U A164104 1,1,9,5,2,6,4,5,1,2,1,3,9,8,1,3,3,8,0,6,2,4,0,9,9,1,6,1,3,9,2,8,4,8,6,4,0 %N A164104 Decimal expansion of 8*Pi^2/3. %C A164104 Surface area of the 5-dimensional unit sphere. %H A164104 G. C. Greubel, <a href="/A164104/b164104.txt">Table of n, a(n) for n = 2..5000</a> %H A164104 Eric Weisstein, <a href="https://mathworld.wolfram.com/Hypersphere.html">Hypersphere</a>, Wolfram Mathworld. %H A164104 Wikipedia, <a href="http://en.wikipedia.org/wiki/Hypersphere">Hypersphere</a> %H A164104 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %F A164104 Equals 5*A164103 = 10 * A019699 * A019692. %e A164104 Equals 26.318945069571622983558642666336... %t A164104 RealDigits[8*Pi^2/3, 10, 50][[1]] (* _G. C. Greubel_, Sep 11 2017 *) %o A164104 (PARI) 8*Pi^2/3 \\ _G. C. Greubel_, Sep 11 2017 %Y A164104 Cf. A019692, A019694, A164102, A091925, A164107, A164109. %K A164104 cons,nonn %O A164104 2,1 %A A164104 _R. J. Mathar_, Aug 10 2009 %E A164104 A-number in formula corrected by _R. J. Mathar_, Aug 12 2010