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 A113906 #6 Feb 12 2023 13:40:44 %S A113906 1,-1,5,-122,1385 %N A113906 Erroneous version of signed Euler numbers (cf. A000364). %D A113906 J. M. Borwein and D. M. Bailey, Mathematics by Experiment, Peters, Boston, 2004; p. 49. %K A113906 dead %O A113906 0,3 %A A113906 _N. J. A. Sloane_, Nov 17 2018