A205230 - OEIS

%I #5 Mar 31 2012 12:37:05

%S 1187,27157,640652,12273323,221519116,3408343704,48815088704,

%T 628179958745,7601482985625,85461685481592,913975093055739,

%U 9268873184287274,90266141973458345,844362225976352539

%N Number of (n+1)X4 0..2 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero

%C Column 3 of A205235

%H R. H. Hardin, <a href="/A205230/b205230.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 24 2012