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A184605 Half the number of (n+1)X(n+1) binary arrays with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one 0
8, 160, 8643, 1396000, 624608260, 771907128421, 2659360843218429, 25614152794948938706 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A184614

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for 4X4

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

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

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

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

...

...3..2..3.......4..3..2.......2..1..0.......2..3..4.......2..2..2...

...2..2..3.......4..3..2.......3..2..1.......3..3..3.......3..2..2...

...1..2..2.......3..3..3.......2..1..2.......3..3..3.......4..3..3...

CROSSREFS

Sequence in context: A052140 A219265 A300466 * A195607 A064755 A140337

Adjacent sequences:  A184602 A184603 A184604 * A184606 A184607 A184608

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 18 2011

STATUS

approved

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Last modified October 1 07:48 EDT 2022. Contains 357135 sequences. (Running on oeis4.)