A197645 Number of nX5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,2,2,0,2 for x=0,1,2,3,4

1, 66, 1649, 25273, 407810, 7296769, 132750533, 2314131736, 40063929560, 703264936092, 12391979695521, 217397062623972, 3806505051819661, 66744185791331423, 1171256388093512981, 20545660988145482478

Offset

1,2

Comments

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

Column 5 of A197648

Links

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

Example

Some solutions containing all values 0 to 4 for n=4
..0..3..0..0..1....2..2..2..0..0....0..3..0..1..0....0..3..0..1..1
..0..0..2..2..2....2..4..2..0..3....3..0..2..2..2....3..0..2..2..2
..3..0..2..4..2....2..2..2..1..0....0..0..2..4..2....0..3..2..4..2
..0..0..2..2..2....0..0..0..0..0....0..1..2..2..2....0..0..2..2..2

Crossrefs

Sequence in context: A241799 A269498 A133318 * A270847 A140925 A269779

Adjacent sequences: A197642 A197643 A197644 * A197646 A197647 A197648

Keyword

nonn

Author

R. H. Hardin Oct 16 2011

Status

approved