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 A233219 Number of 3Xn 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order 1

%I #4 Dec 06 2013 05:45:21

%S 11,452,35446,3054973,268289572,23644611625,2085188355031,

%T 183912477980908,16221346021645357,1430752109958104260,

%U 126195026132569335016,11130640168352123713243,981743557172626207811542

%N Number of 3Xn 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order

%C Row 3 of A233217

%H R. H. Hardin, <a href="/A233219/b233219.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 111*a(n-1) -2128*a(n-2) +10532*a(n-3) -17559*a(n-4) +9045*a(n-5) for n>7

%e Some solutions for n=3

%e ..0..1..0....0..1..0....0..1..5....0..1..1....0..1..2....0..1..2....0..1..2

%e ..0..2..1....5..1..0....2..4..2....1..0..2....3..5..1....5..5..5....1..1..0

%e ..4..0..4....2..2..0....0..0..0....2..1..1....1..1..0....3..3..5....1..1..3

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 06 2013

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Last modified June 2 02:01 EDT 2023. Contains 363081 sequences. (Running on oeis4.)