A223051 Number of nX5 0..3 arrays with exactly floor(nX5/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order

20, 6918, 3760845, 3067927359, 1653232100317, 1418400034832894, 776620828154120451, 685712239235601065412, 379328869203024209340509, 340703560737717064297739304

Offset

1,1

Comments

Column 5 of A223052

Links

Table of n, a(n) for n=1..10.

Example

Some solutions for n=3
..0..0..1..2..0....0..0..1..2..1....0..0..1..2..1....0..0..1..2..3
..3..0..1..3..2....2..0..3..3..1....0..0..3..0..2....3..0..1..1..3
..1..0..3..0..1....3..0..2..1..0....1..0..1..0..3....1..2..1..0..2

Crossrefs

Sequence in context: A175015 A135292 A222721 * A222744 A234459 A013725

Adjacent sequences: A223048 A223049 A223050 * A223052 A223053 A223054

Keyword

nonn

Author

R. H. Hardin Mar 13 2013

Status

approved