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 A229099 #20 Feb 21 2025 17:26:03 %S A229099 3,9,2,0,7,2,8,9,8,1,4,5,9,7,3,3,7,1,3,3,6,7,2,3,2,2,0,7,4,1,6,3,4,1, %T A229099 6,6,5,7,3,8,4,7,3,5,1,9,6,6,5,2,0,7,0,6,9,2,6,3,4,5,8,0,8,6,3,4,9,6, %U A229099 1,2,7,4,2,2,6,5,8,7,3,5,2,8,5,2,7,4,4,3,5,6,4,4 %N A229099 Decimal expansion of 1 - 6/Pi^2. %C A229099 Probability that a random number is not squarefree; probability that two random numbers have a common divisor greater than 1. %H A229099 Charles R Greathouse IV, <a href="/A229099/b229099.txt">Table of n, a(n) for n = 0..10000</a> %H A229099 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %F A229099 Equals 1 - 1/zeta(2). - _Stefano Spezia_, Feb 21 2025 %e A229099 0.39207289814597337133672322074163416657384735196652070692634580863496... %t A229099 RealDigits[1-1/Zeta[2],10,90][[1]] (* _Stefano Spezia_, Feb 21 2025 *) %o A229099 (PARI) 1-6/Pi^2 %Y A229099 Cf. A000796, A002388, A013661, A059956, A063035. %K A229099 nonn,cons,easy %O A229099 0,1 %A A229099 _Charles R Greathouse IV_, Sep 13 2013