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 A219476 #5 Jul 23 2025 00:30:35 %S A219476 84,1471,185800,17399442,1357658929,86755752059,4758315482104 %N A219476 Number of 6Xn arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..3 6Xn array. %C A219476 Row 6 of A219471 %e A219476 Some solutions for n=3 %e A219476 ..0..0..2....0..0..2....0..0..2....0..0..1....0..0..1....0..0..0....0..0..0 %e A219476 ..0..0..0....1..1..1....0..0..1....0..0..0....0..0..0....0..0..2....0..1..1 %e A219476 ..0..0..0....2..0..0....1..1..2....2..0..1....0..0..1....2..1..1....1..0..0 %e A219476 ..0..1..1....2..0..2....3..2..2....1..1..1....0..0..2....2..1..2....2..0..0 %e A219476 ..1..1..1....2..3..3....3..2..2....1..1..2....0..0..0....2..2..2....0..0..0 %e A219476 ..1..2..2....3..3..3....3..2..3....3..2..3....0..0..3....3..1..1....0..2..2 %K A219476 nonn %O A219476 1,1 %A A219476 _R. H. Hardin_ Nov 20 2012