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 A264833 #5 May 10 2021 12:19:46 %S A264833 1,3,33,495,17181,881444,43181739,4357672022 %N A264833 Number of 3 X n arrays of permutations of 0..n*3-1 with rows nondecreasing modulo 4 and columns nondecreasing modulo 7. %C A264833 Row 3 of A264831. %e A264833 Some solutions for n=4 %e A264833 ..8..0..4..1....0..2..7..3....8..0.10..2....8..0..2..7....0..8.11..7 %e A264833 ..2..7.11..3....8..4..1.10....1..7.11..3....1..9..3.11....9..1..5..3 %e A264833 ..5..9..6.10....9..5..6.11....4..9..5..6....4..5.10..6....4..2..6.10 %Y A264833 Cf. A264831. %K A264833 nonn %O A264833 1,2 %A A264833 _R. H. Hardin_, Nov 26 2015