A196011 Number of n X n 0..4 arrays with each element equal to the number of its horizontal and vertical neighbors within one of itself

1, 1, 2, 25, 106, 708, 22711, 670449, 44864449, 5122273171, 1106078073333, 426788297174150

Offset

1,3

Comments

Diagonal of A196017

Links

Table of n, a(n) for n=1..12.

Example

Some solutions for n=4
..2..3..2..2....2..3..2..0....0..2..3..2....0..2..2..2....2..2..3..2
..3..3..0..2....3..4..3..2....2..3..4..3....2..3..0..2....2..0..3..3
..3..4..3..2....2..3..0..2....2..0..3..2....3..4..3..2....2..3..4..3
..2..3..2..0....0..2..2..2....2..2..2..0....2..3..2..0....0..2..3..2

Crossrefs

Sequence in context: A123012 A175522 A226418 * A080515 A258943 A009381

Adjacent sequences: A196008 A196009 A196010 * A196012 A196013 A196014

Keyword

nonn

Author

R. H. Hardin Sep 26 2011

Status

approved