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 A351241 #4 Feb 06 2022 23:06:18 %S A351241 1,1,1,1,1,1,1,1,1,1,1,1,1,5,1,1,8546700,9763,49 %N A351241 Denominator of the maximal sum of inverse squares of the singular values of symmetric Toeplitz anti-Hadamard matrices of order n. %H A351241 R. L. Graham and N. J. A. Sloane, <a href="http://dx.doi.org/10.1016/0024-3795(84)90090-9">Anti-Hadamard matrices</a>, Linear Alg. Applic., 62 (1984), 113-137. %Y A351241 Cf. A005312, A005313, A351240 (numerator). %K A351241 nonn,frac,more %O A351241 1,14 %A A351241 _Stefano Spezia_, Feb 05 2022