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A223622 Number of nX4 0..1 arrays with row sums nondecreasing and column sums unimodal 1

%I #4 Mar 24 2013 10:26:21

%S 11,98,751,5303,35413,228401,1437511,8898472,54437857,330381980,

%T 1993659689,11985196268,71858499637,430123654878,2571650477297,

%U 15366254287831,91781204372957,548141570513665,3273511579537537

%N Number of nX4 0..1 arrays with row sums nondecreasing and column sums unimodal

%C Column 4 of A223625

%H R. H. Hardin, <a href="/A223622/b223622.txt">Table of n, a(n) for n = 1..28</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 24 2013

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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)