A233235 Number of nX4 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally, diagonally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order

23, 4504, 1212549, 338046654, 94601758339, 26484848685044, 7415057313896849, 2076029517168733114, 581236325493128357679, 162731637919752077883024, 45560789933070584072872669, 12755882058893937419188740854

Offset

1,1

Comments

Column 4 of A233239

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 311*a(n-1) -8722*a(n-2) +10022*a(n-3) -1645*a(n-4) +35*a(n-5)

Example

Some solutions for n=2
..0..1..1..1....0..1..5..4....0..0..1..0....0..1..5..2....0..1..0..2
..2..2..5..5....0..2..5..4....2..0..2..5....0..1..5..5....0..2..1..2

Crossrefs

Sequence in context: A308458 A103443 A059000 * A286706 A366585 A134801

Adjacent sequences: A233232 A233233 A233234 * A233236 A233237 A233238

Keyword

nonn

Author

R. H. Hardin, Dec 06 2013

Status

approved