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 A003883 #10 Jun 14 2024 22:31:08
%S A003883 1,7,7,12,12,12,13,14,14
%N A003883 Degrees of irreducible representations of group L2(13).
%D A003883 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 A003883 (GAP) List(Irr(CharacterTable("L2(13)")), chi->chi[1]); # _Eric M. Schmidt_, Jul 18 2012
%K A003883 nonn,fini,full
%O A003883 1,2
%A A003883 _N. J. A. Sloane_