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A233876 Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having the sum of the squares of all six edge and diagonal differences equal to 11 0
24, 300, 6200, 251532, 15013864, 2431002508, 403041750472, 285753346219740, 125838291171855560, 411608030729505994828, 465691063859195409734664 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A233883

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A321953 A206002 A000552 * A171742 A187851 A125436

Adjacent sequences:  A233873 A233874 A233875 * A233877 A233878 A233879

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 17 2013

STATUS

approved

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Last modified September 25 13:37 EDT 2021. Contains 347654 sequences. (Running on oeis4.)