A222569 Number of n X 4 0..2 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order.

4, 10, 56, 435, 4790, 50535, 547563, 5815939, 63130202, 676152734, 7328771224, 79083695286, 857913193954, 9302185273377, 101073333908828, 1099637763169027, 11970412457540599, 130557727722965457, 1423911243991041430

Offset

1,1

Comments

Column 4 of A222573.

Links

R. H. Hardin, Table of n, a(n) for n = 1..128

Example

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

Crossrefs

Cf. A222573.

Sequence in context: A225543 A002290 A336997 * A348514 A254078 A104363

Adjacent sequences: A222566 A222567 A222568 * A222570 A222571 A222572

Keyword

nonn

Author

R. H. Hardin Feb 25 2013

Status

approved