A185538 1/6 the number of nX5 0..5 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors

11, 12105, 4403225, 2241330570, 994633804270, 468362874353295

Offset

1,1

Comments

Column 5 of A185540

Links

Table of n, a(n) for n=1..6.

Example

Some solutions for 3X5 with a(1,1)=0
..0..0..0..4..4....0..0..3..3..5....0..0..0..3..4....0..0..0..0..1
..0..3..3..2..4....3..3..4..3..5....0..3..1..3..4....0..3..2..1..1
..0..0..0..2..2....0..0..4..4..5....0..3..1..5..5....0..3..2..5..5

Crossrefs

Sequence in context: A228533 A088103 A180561 * A125545 A068137 A220979

Adjacent sequences: A185535 A185536 A185537 * A185539 A185540 A185541

Keyword

nonn

Author

R. H. Hardin Jan 30 2011

Status

approved