A223112 Number of nX4 0..2 arrays with exactly floor(nX4/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order

6, 124, 5624, 244607, 10831996, 488343248, 22325434918, 1030482342515, 47916590696295, 2241101562438012, 105316304676988484, 4968633132901498380, 235188969754972369712, 11164172762230170428454, 531250275464927363854476

Offset

1,1

Comments

Column 4 of A223114

Links

R. H. Hardin, Table of n, a(n) for n = 1..58

Example

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

Crossrefs

Sequence in context: A193223 A372920 A132507 * A224089 A331837 A254544

Adjacent sequences: A223109 A223110 A223111 * A223113 A223114 A223115

Keyword

nonn

Author

R. H. Hardin Mar 14 2013

Status

approved