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URL: https://oeis.org/A251327

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A251327
Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock summing to 2 4 or 6.
0
39, 1115, 75391, 13857083, 8130801167, 16682303832387, 119455642968747047, 2906457494360881156619, 236005702652830583741374855, 63305022966063301195370267957275
OFFSET
1,1
COMMENTS
Diagonal of A251335
EXAMPLE
Some solutions for n=3
..0..0..0..0....0..2..0..2....0..0..0..2....0..2..0..0....2..2..2..2
..2..2..2..2....2..0..2..2....2..2..0..2....2..0..2..2....0..2..0..2
..2..0..0..0....2..0..2..0....2..0..0..0....2..2..0..0....0..2..0..2
..1..1..1..1....2..0..0..0....2..0..2..2....0..2..2..0....0..0..0..0
CROSSREFS
Sequence in context: A028227 A028219 A209076 * A014936 A227524 A240442
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 01 2014
STATUS
approved