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A201231 Number of nX4 0..3 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 1

%I #5 Mar 31 2012 12:36:44

%S 3,24,140,1028,7791,66027,508368,4293464,33177954,282310785,

%T 2226471492,18845872240,149352193586,1252800269866,9919439949887,

%U 82782378005253,656171911832714,5446960364973500,43213785216715427,357463895275500826

%N Number of nX4 0..3 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 Column 4 of A201235

%H R. H. Hardin, <a href="/A201231/b201231.txt">Table of n, a(n) for n = 1..23</a>

%e Some solutions for n=6

%e ..0..0..0..0....0..0..0..1....0..0..0..1....0..0..0..0....0..0..0..0

%e ..0..1..2..1....0..1..1..1....0..0..0..2....0..1..1..1....0..0..3..1

%e ..0..1..2..3....0..3..3..2....1..1..1..2....0..3..2..3....2..2..2..3

%e ..1..1..3..2....0..3..2..2....1..3..2..3....1..3..2..2....1..2..3..2

%e ..3..3..3..3....1..3..2..2....1..2..3..2....1..3..2..2....1..1..3..2

%e ..1..2..2..2....1..3..2..3....2..3..3..3....1..3..2..3....1..1..3..3

%K nonn

%O 1,1

%A _R. H. Hardin_ Nov 28 2011

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Last modified April 16 04:38 EDT 2024. Contains 371696 sequences. (Running on oeis4.)