login
A233109
Number of nX4 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally or vertically, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order
1
23, 6046, 2154065, 794723482, 294285758398, 109015274761891, 40385221182281560, 14960955484170769147, 5542380989283805407733, 2053210330075493118514936, 760624844506193044187974495
OFFSET
1,1
COMMENTS
Column 4 of A233113
LINKS
FORMULA
Empirical: a(n) = 445*a(n-1) -29415*a(n-2) +684239*a(n-3) -6544703*a(n-4) +26009211*a(n-5) -37153497*a(n-6) +17033721*a(n-7)
EXAMPLE
Some solutions for n=2
..0..1..5..4....0..1..2..4....0..1..2..5....0..1..2..2....0..1..2..5
..2..5..4..2....1..5..2..5....4..3..0..3....1..0..1..2....3..5..4..5
CROSSREFS
Sequence in context: A134801 A059932 A045735 * A193430 A233213 A368142
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 04 2013
STATUS
approved