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 A200901 #6 Jul 22 2025 16:00:03 %S A200901 214,84463,28966191,6469118415,784706456797 %N A200901 Number of nX7 0..5 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other. %C A200901 Column 7 of A200902 %e A200901 Some solutions for n=2 %e A200901 ..0..1..2..3..2..3..4....0..0..0..2..3..2..2....0..0..3..1..1..3..3 %e A200901 ..0..1..5..4..4..5..5....1..1..3..5..5..4..4....2..2..5..5..4..4..5 %K A200901 nonn %O A200901 1,1 %A A200901 _R. H. Hardin_ Nov 23 2011