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 A114610 #16 Feb 16 2025 08:32:59 %S A114610 1,0,0,0,0,0,0,0,0,0,0,4,8,8,5,1,0,9,0,4,1,3,8,2,5,1,5,6,2,4,3,0,7,8, %T A114610 8,6,9,9,9,1,1,6,7,9,6,0,8,2,6,3,8,2,8,0,4,0,1,4,7,1,1,1,6,2,8,2,6,6, %U A114610 2,6,0,6,3,0,5,1,1,9,7,2,0,8,1,6,6,8,5,5,1,0,0,7,2,6,9,1,3,8,0,1,2,5 %N A114610 Decimal expansion of Sum_{k=-infinity..+infinity} log(2)/(2^(-k/2) + 2^(k/2))^2. %C A114610 Differs from 1 by 4.9*10^-11. %H A114610 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/AlmostInteger.html">Almost Integer</a> %e A114610 1.00000000004885109041382... %t A114610 almostOne = Log[2]/4 + 2*Log[2]*NSum[1/(2^(-k/2) + 2^(k/2))^2, {k, 1, Infinity}, WorkingPrecision -> 110, NSumTerms -> 100]; RealDigits[almostOne, 10, 102] // First (* _Jean-François Alcover_, Feb 07 2013 *) %t A114610 RealDigits[Re[2 - Log[2]/4 - 2*(QPolyGamma[1, -((I*Pi)/Log[2]), Sqrt[2]] + QPolyGamma[1, (I*Pi)/Log[2], Sqrt[2]])/Log[2]],10,100][[1]] (* _Vaclav Kotesovec_, Aug 17 2015 *) %K A114610 nonn,cons %O A114610 0,12 %A A114610 _Eric W. Weisstein_, Dec 15 2005