A184768 - OEIS

%I #5 Mar 31 2012 12:36:01

%S 13096,1792144,62051344,4975179472,267277851856,18492329456080,

%T 1156853256240592,77441892454241488,5064538742140130512,

%U 336992694113719404496,22308222687181070310352,1483254308363737851935440

%N Number of (n+1)X5 0..3 arrays with every 2X2 subblock singular

%C Column 4 of A184773

%H R. H. Hardin, <a href="/A184768/b184768.txt">Table of n, a(n) for n = 1..200</a>

%F Empirical: a(n)=125*a(n-1)-3742*a(n-2)-75002*a(n-3)+5541175*a(n-4)-78252347*a(n-5)-405474456*a(n-6)+19948799736*a(n-7)-168899420160*a(n-8)+136470432960*a(n-9)+5318338217472*a(n-10)-29099331896832*a(n-11)+52877545500672*a(n-12)-7064061788160*a(n-13)-49630637260800*a(n-14)

%e Some solutions for 3X5

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 21 2011