cp's OEIS Frontend

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.

A201067 Number of nX3 0..6 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

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%I A201067 #7 Jul 22 2025 16:04:29
%S A201067 35,35,514,2611,3937,50334,4448,381982,206357,1377351,2831603,1974341,
%T A201067 20355511,1239614,73355614,25640082,134750988,236836508,134563397,
%U A201067 1068791444,49395188,2697358626,852508061,3859642876,5707775509
%N A201067 Number of nX3 0..6 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.
%C A201067 Column 3 of A201072
%H A201067 R. H. Hardin, <a href="/A201067/b201067.txt">Table of n, a(n) for n = 1..58</a>
%e A201067 Some solutions for n=7
%e A201067 ..0..0..3....0..1..3....0..0..0....0..0..2....0..0..0....0..1..1....0..0..1
%e A201067 ..0..1..4....0..2..3....1..1..2....0..1..2....1..2..5....0..2..3....0..2..3
%e A201067 ..1..1..4....0..2..4....1..2..2....1..1..4....1..3..5....0..2..4....1..2..3
%e A201067 ..2..3..4....1..2..5....3..3..5....2..3..5....1..3..5....1..2..5....1..3..4
%e A201067 ..2..3..5....1..3..6....3..4..5....3..3..6....2..3..6....3..3..6....2..4..5
%e A201067 ..2..5..5....4..5..6....4..5..6....4..5..6....2..4..6....4..4..6....4..5..5
%e A201067 ..6..6..6....4..5..6....4..6..6....4..5..6....4..4..6....5..5..6....6..6..6
%K A201067 nonn
%O A201067 1,1
%A A201067 _R. H. Hardin_ Nov 26 2011