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.

A219684 Number of nX6 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 nX6 array.

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%I A219684 #6 Jul 23 2025 00:36:10
%S A219684 21,32,452,5031,44736,344926,2706117,22404783,187497531,1518906665,
%T A219684 11728070120,86620862097,616844079105,4256996307319,28523072830335,
%U A219684 185674613829792,1175484129892778,7248518396992789,43607030016608124
%N A219684 Number of nX6 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 nX6 array.
%C A219684 Column 6 of A219686
%H A219684 R. H. Hardin, <a href="/A219684/b219684.txt">Table of n, a(n) for n = 1..34</a>
%e A219684 Some solutions for n=3
%e A219684 ..2..2..2..1..0..0....1..1..0..0..0..0....2..0..0..0..0..0....1..1..1..1..0..0
%e A219684 ..2..2..2..1..0..0....1..1..0..0..0..0....2..0..0..0..0..0....1..1..1..1..0..0
%e A219684 ..2..2..2..1..1..2....1..1..1..0..0..0....2..2..2..2..1..1....2..2..1..0..0..0
%K A219684 nonn
%O A219684 1,1
%A A219684 _R. H. Hardin_ Nov 25 2012