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A233941 Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having the sum of the absolute values of the edge differences equal to 4 0
44, 2108, 328508, 176523392, 327319305140, 2123808459730080, 48397283414008033460, 3890410142021294923041716, 1105116797109942923859722977708, 1111125061956511417987148049668526572 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A233949

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=2

..2..2..2....0..0..0....1..0..0....0..2..2....2..1..0....2..0..1....2..1..0

..2..0..2....2..2..0....0..1..2....0..0..1....1..2..0....2..1..2....1..2..1

..2..0..2....2..0..0....0..2..1....1..2..1....0..1..1....1..0..0....2..1..2

CROSSREFS

Sequence in context: A094506 A121008 A250446 * A329302 A271137 A234833

Adjacent sequences:  A233938 A233939 A233940 * A233942 A233943 A233944

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 18 2013

STATUS

approved

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Last modified September 30 07:52 EDT 2022. Contains 357104 sequences. (Running on oeis4.)