A222567 Number of nX2 0..2 arrays with no more than floor(nX2/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order

1, 1, 5, 18, 59, 200, 820, 3014, 11364, 42748, 164652, 627034, 2399454, 9229494, 35487202, 137093302, 528389870, 2048668614, 7920616338, 30777407006, 119302534874, 464420087686, 1804371752146, 7034061387558, 27382292281570

Offset

1,3

Comments

Column 2 of A222573

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

All solutions for n=3
..0..0....0..0....0..0....0..1....0..1
..0..0....0..0....0..0....1..1....0..0
..0..0....1..0....0..1....1..1....0..0

Crossrefs

Sequence in context: A133648 A377866 A284968 * A377857 A099449 A104630

Adjacent sequences: A222564 A222565 A222566 * A222568 A222569 A222570

Keyword

nonn

Author

R. H. Hardin Feb 25 2013

Status

approved