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 A067222 #11 Oct 14 2024 10:56:00 %S A067222 1,15,225,229503,42980713761,1380524064964529355, %T A067222 7955148565342992851131291305 %N A067222 Number of n X n 0..14 matrices with all row and column sums equal. %Y A067222 Column k=14 of A202784. %K A067222 nonn,more %O A067222 0,2 %A A067222 _R. H. Hardin_, Feb 20 2002 %E A067222 a(5)-a(6) from _Sean A. Irvine_, Dec 10 2023 %E A067222 a(0)=1 prepended by _Andrew Howroyd_, Oct 14 2024