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 A200527 #8 Jul 22 2025 15:50:50 %S A200527 3,20,243,4848,167171,10000162,1056792824,201092476918,70051408245054, %T A200527 45119084364602004 %N A200527 Number of n X n 0..2 arrays with every row and column running average nondecreasing rightwards and downwards. %C A200527 Diagonal of A200534 %e A200527 Some solutions for n=4 %e A200527 ..0..0..0..0....0..0..0..2....0..0..0..0....0..0..0..0....0..0..2..1 %e A200527 ..0..0..0..2....0..0..1..2....0..2..2..2....0..0..0..0....0..0..2..1 %e A200527 ..0..0..1..2....0..0..2..2....1..1..1..2....0..2..2..2....0..0..2..1 %e A200527 ..0..1..1..2....0..1..2..2....1..1..1..2....1..1..1..1....1..1..2..2 %K A200527 nonn %O A200527 1,1 %A A200527 _R. H. Hardin_ Nov 18 2011