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 A219600 #5 Jul 23 2025 00:34:37 %S A219600 28,247,4129,60252,1093496,21435360,415752625 %N A219600 Number of 7Xn arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 7Xn array. %C A219600 Row 7 of A219595 %e A219600 Some solutions for n=3 %e A219600 ..0..0..0....0..0..0....1..0..0....0..0..0....1..0..0....0..0..0....1..1..1 %e A219600 ..1..0..0....0..0..0....1..0..0....0..0..0....1..1..0....1..0..0....1..1..1 %e A219600 ..1..1..1....1..1..1....1..1..0....1..0..0....1..0..0....1..1..1....1..1..0 %e A219600 ..1..1..0....1..1..1....1..0..1....2..1..0....0..0..0....1..0..1....1..0..0 %e A219600 ..1..0..0....2..2..1....0..0..0....2..2..1....0..0..0....0..0..0....1..0..0 %e A219600 ..0..0..0....2..2..2....2..0..1....2..2..2....2..0..1....0..0..0....2..0..0 %e A219600 ..1..0..0....2..2..2....2..1..1....2..2..2....2..1..1....2..0..0....2..2..0 %K A219600 nonn %O A219600 1,1 %A A219600 _R. H. Hardin_ Nov 23 2012