A251327 Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock summing to 2 4 or 6

39, 1115, 75391, 13857083, 8130801167, 16682303832387, 119455642968747047, 2906457494360881156619, 236005702652830583741374855, 63305022966063301195370267957275

Offset

1,1

Comments

Diagonal of A251335

Links

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

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

Adjacent sequences: A251324 A251325 A251326 * A251328 A251329 A251330

Keyword

nonn

Author

R. H. Hardin, Dec 01 2014

Status

approved