A203792 - OEIS

%I #5 Mar 31 2012 12:36:58

%S 38416,1911952,101071600,5426653360,292394880208,15768587718160,

%T 850544485943152,45880025360206384,2474880694628072272,

%U 133501541652044308624,7201425164076337197808,388463950220945824301488

%N Number of (n+1)X5 0..3 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements

%C Column 4 of A203796

%H R. H. Hardin, <a href="/A203792/b203792.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 49*a(n-1) +543*a(n-2) -15435*a(n-3) +26244*a(n-4) +117288*a(n-5) -79704*a(n-6) -46656*a(n-7)

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 05 2012