A238648 - OEIS

A238648

Number of (n+2) X (n+2) 0..1 arrays with no element equal to all horizontal neighbors or equal to all vertical neighbors, and new values 0..1 introduced in row major order.

1, 8, 51, 1015, 30116, 1929041, 223336353, 50789138692, 21840171519903, 18066655662899887, 28530669418446423314, 86301791696353013652605

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Diagonal of A238654.

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=5

..0..1..0..0..1..1..0....0..1..0..0..1..1..0....0..1..0..1..0..0..1

..1..0..1..1..0..0..1....1..0..1..1..0..0..1....1..0..1..0..1..1..0

..0..1..0..0..1..0..1....0..1..0..1..1..0..1....1..0..0..1..1..0..1

..1..0..0..1..0..1..0....0..1..1..0..0..1..0....0..1..1..0..0..1..0

..1..0..1..1..0..0..1....1..0..0..1..1..0..1....0..1..0..0..1..0..1

..0..1..0..0..1..1..0....1..0..1..1..0..1..0....1..0..0..1..0..1..0

..1..0..1..1..0..0..1....0..1..0..0..1..0..1....0..1..1..0..1..0..1

CROSSREFS

Cf. A238654.

Sequence in context: A295602 A226199 A267637 * A341626 A215834 A180319

Adjacent sequences: A238645 A238646 A238647 * A238649 A238650 A238651

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 02 2014

STATUS

approved