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A208465 Number of nX6 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.

%I A208465 #7 Jul 22 2025 21:22:47
%S A208465 203,4132120,671329819215,440379403449903222,838156242834826375910795,
%T A208465 3787532222733253394267947322830,
%U A208465 35487456577214016192433880229514302813,625053889686420860521751650397504301747811997
%N A208465 Number of nX6 nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.
%C A208465 Column 6 of A208466
%H A208465 R. H. Hardin, <a href="/A208465/b208465.txt">Table of n, a(n) for n = 1..11</a>
%e A208465 Some solutions for n=4
%e A208465 ..0..0..0..0..0..0....0..0..0..0..1..1....0..0..0..0..0..0....0..0..0..0..1..0
%e A208465 ..0..1..0..1..0..2....0..1..0..0..0..0....0..1..0..1..0..0....0..1..0..0..0..0
%e A208465 ..0..0..0..0..0..0....2..0..1..0..1..0....1..0..0..0..1..0....0..0..1..0..1..0
%e A208465 ..2..0..1..0..1..0....1..0..0..2..0..0....0..1..0..0..2..0....0..0..0..0..0..0
%K A208465 nonn
%O A208465 1,1
%A A208465 _R. H. Hardin_ Feb 27 2012