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A250957 Number of (n+1)X(n+1) 0..3 arrays with no 2X2 subblock having its minimum diagonal element less than its minimum antidiagonal element 1

%I

%S 170,34988,42534386,333998523952,15830978769561242,

%T 4633149318453116653026,8364724418212952351480546203,

%U 92715859612444518806837176313688042

%N Number of (n+1)X(n+1) 0..3 arrays with no 2X2 subblock having its minimum diagonal element less than its minimum antidiagonal element

%C Diagonal of A250965

%H R. H. Hardin, <a href="/A250957/b250957.txt">Table of n, a(n) for n = 1..9</a>

%e Some solutions for n=2

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 29 2014

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Last modified June 25 03:59 EDT 2022. Contains 354835 sequences. (Running on oeis4.)