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 A013561 #25 Oct 07 2021 14:59:35 %S A013561 1,1,1,1,3,1,1,11,11,1,1,31,90,31,1,1,85,544,544,85,1,1,225,2997,6559, %T A013561 2997,225,1 %N A013561 Erroneous version of A348211. %H A013561 D.-N. Verma, <a href="/A012249/a012249.pdf">Towards Classifying Finite Point-Set Configurations</a>, 1997, Unpublished. [Scanned copy of annotated version of preprint given to me by the author in 1997. - _N. J. A. Sloane_, Oct 04 2021] %K A013561 dead %O A013561 3,5