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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. 0
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

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Last modified November 29 21:32 EST 2021. Contains 349416 sequences. (Running on oeis4.)