A205201 - OEIS

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

%S 2830,71355,1649549,30972970,560385415,9153899777,145848261106,

%T 2212185100843,33020359800288,481447058537957,6954829242271663,

%U 99373631556461784,1412980217264335644,19991930404931305073

%N Number of (n+1)X4 0..2 arrays with the permanents of 2X2 subblocks nondecreasing rightwards and downwards

%C Column 3 of A205206

%H R. H. Hardin, <a href="/A205201/b205201.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 23 2012