A234209 Number of (n+1)X(n+1) 0..4 arrays with every 2X2 subblock having the sum of the squares of all six edge and diagonal differences equal to 11

72, 1540, 40384, 2047712, 125726800, 20127064876, 3176900588064, 1963380942087312

Offset

1,1

Comments

Diagonal of A234217

Links

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

Example

Some solutions for n=3
..1..2..0..2....4..3..4..3....3..2..3..4....1..3..2..3....1..3..2..3
..2..0..1..0....4..2..2..4....4..4..4..2....2..3..1..3....2..1..1..3
..1..2..0..2....2..3..4..3....3..2..3..2....1..1..2..1....1..3..2..1
..3..1..0..1....4..2..2..2....2..4..4..2....2..3..1..3....2..1..3..1

Crossrefs

Sequence in context: A282018 A037251 A352994 * A280807 A268749 A008659

Adjacent sequences: A234206 A234207 A234208 * A234210 A234211 A234212

Keyword

nonn

Author

R. H. Hardin, Dec 21 2013

Status

approved