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A233920 Number of (n+1)X(n+1) 0..4 arrays with every 2X2 subblock having the sum of the absolute values of the edge differences equal to 8 and no adjacent elements equal 0
98, 4010, 405004, 117016814, 100717013560, 272824817463304, 2356133940564872484, 65853842991654598963706 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A233928

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A271037 A243477 A178974 * A017814 A035744 A017761

Adjacent sequences:  A233917 A233918 A233919 * A233921 A233922 A233923

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 17 2013

STATUS

approved

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Last modified October 27 05:20 EDT 2021. Contains 348271 sequences. (Running on oeis4.)