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A235414 Number of (n+1)X(2+1) 0..3 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise 1

%I #5 Jan 10 2014 07:10:48

%S 2400,64848,1826923,37684700,782294899,12863400296,211918008383,

%T 2916338598826,40162081074843,478836923802673,5712559047430864,

%U 60505768056073434,641415858012884696,6149515043055326889

%N Number of (n+1)X(2+1) 0..3 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise

%C Column 2 of A235416

%H R. H. Hardin, <a href="/A235414/b235414.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 10 2014

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Last modified April 24 14:17 EDT 2024. Contains 371960 sequences. (Running on oeis4.)