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 A214010 #6 Jun 02 2025 08:05:09 %S A214010 7,1372,9976732,2747459653062,29476753771054668510 %N A214010 Number of n X n nonnegative integer matrices with row and column i=1..n having sum <= i*6. %C A214010 Column 6 of A214011 %e A214010 Some solutions for n=3 %e A214010 ..0..4..0....0..3..0....0..0..0....0..3..0....0..1..0....0..1..4....3..0..0 %e A214010 ..0..0..0....3..3..0....2..3..4....0..0..7....2..0..0....6..0..0....0..9..0 %e A214010 ..4..0..0....0..5..4....0..1..0....0..0.10....0..1..1....0..5..5....0..0..5 %K A214010 nonn %O A214010 1,1 %A A214010 _R. H. Hardin_ Jun 30 2012