A223127 Number of 2Xn 0..2 arrays with no more than floor(2Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order

2, 10, 64, 489, 3599, 27803, 212771, 1656545, 12904694, 101255205, 796288843, 6286246396, 49736262634, 394474774687, 3134464364251, 24950223830205, 198897142545467, 1587722400605459, 12689418744067169, 101527684281703007

Offset

1,1

Comments

Row 2 of A223126

Links

R. H. Hardin, Table of n, a(n) for n = 1..29

Example

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

Crossrefs

Sequence in context: A186268 A078531 A319360 * A361407 A323666 A318814

Adjacent sequences: A223124 A223125 A223126 * A223128 A223129 A223130

Keyword

nonn

Author

R. H. Hardin Mar 15 2013

Status

approved