A222544 Number of 4Xn 0..1 arrays with no more than floor(4Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order

8, 16, 58, 161, 772, 3293, 15953, 76735, 383220, 1900094, 9560906, 47821930, 241590979, 1216723067, 6165005085, 31195897233, 158467249594, 804787924791, 4097548729951, 20868775187686, 106469220371894, 543485624369575

Offset

1,1

Comments

Row 4 of A222541

Links

R. H. Hardin, Table of n, a(n) for n = 1..78

Example

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

Crossrefs

Sequence in context: A209997 A212764 A133581 * A307876 A166638 A356961

Adjacent sequences: A222541 A222542 A222543 * A222545 A222546 A222547

Keyword

nonn

Author

R. H. Hardin Feb 24 2013

Status

approved