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 A003861 #11 Jun 14 2024 22:31:08
%S A003861 1,5,5,8,8,9,10
%N A003861 Degrees of irreducible representations of alternating group A_6.
%D A003861 J. H. Conway, R. T. Curtis, S. P. Norton, R. A. Parker and R. A. Wilson, ATLAS of Finite Groups. Oxford Univ. Press, 1985 [for best online version see https://oeis.org/wiki/Welcome#Links_to_Other_Sites].
%o A003861 (GAP) List(Irr(CharacterTable("A6")), chi->chi[1]); # _Eric M. Schmidt_, Jul 18 2012
%K A003861 nonn,fini,full
%O A003861 1,2
%A A003861 _N. J. A. Sloane_