A197166 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,2,1,4,0 for x=0,1,2,3,4

9, 803, 34021, 1566649, 76504483, 3683084153, 178698032203, 8671417152697, 420572258618870, 20392149427584727, 988923590004910009, 47963802827535239077, 2326158501038746896505, 112811333889530786883021

Offset

1,1

Comments

Every 0 is next to 0 3's, every 1 is next to 1 2's, every 2 is next to 2 1's, every 3 is next to 3 4's, every 4 is next to 4 0's

Column 7 of A197167

Links

R. H. Hardin, Table of n, a(n) for n = 1..166

Example

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

Crossrefs

Sequence in context: A272853 A332179 A196981 * A015025 A225169 A287034

Adjacent sequences: A197163 A197164 A197165 * A197167 A197168 A197169

Keyword

nonn

Author

R. H. Hardin Oct 10 2011

Status

approved