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A235424 Number of (4+1)X(n+1) 0..2 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise 1

%I

%S 9504,533868,33411901,1782209164,93548701107,4160234178885,

%T 185279527641812,7009502577083519,270646584192371106,

%U 8899758764503359520,302512531294820523210,8802358542173512135563,266430632381355740092269

%N Number of (4+1)X(n+1) 0..2 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise

%C Row 4 of A235421

%H R. H. Hardin, <a href="/A235424/b235424.txt">Table of n, a(n) for n = 1..14</a>

%e Some solutions for n=1

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 10 2014

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Last modified October 3 10:36 EDT 2022. Contains 357231 sequences. (Running on oeis4.)