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 A203751 #7 Dec 25 2023 18:19:14 %S A203751 1,28,2223,348096,90342525,35072751168,19032068719251, %T A203751 13756565090451456,12775892214399798393,14824546431176926080000, %U A203751 21017232832355388070681239,35747134161893416732467658752 %N A203751 Square root of v(2n+1)/(3v(2n)), where v=A203748. %C A203751 See A203748. %t A203751 (See A203748.) %Y A203751 Cf. A203748. %K A203751 nonn %O A203751 1,2 %A A203751 _Clark Kimberling_, Jan 05 2012