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 A031400 #10 Jan 27 2021 07:28:41 %S A031400 2,11,32,204,894,44093,176392,1587590,1587590,192099588,192099588 %N A031400 Period of continued fraction for sqrt(k) equal for all a(n) <= k < a(n)+n. %Y A031400 Cf. A031401. %K A031400 nonn,more %O A031400 1,1 %A A031400 _David W. Wilson_ %E A031400 a(10)-a(11) from _Chai Wah Wu_, Jan 26 2021