A233884 Number of (n+1)X(n+1) 0..6 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 30, and no two adjacent values equal

112, 1960, 65280, 5859504, 1057449360, 537828679688, 530020280813856, 1549770491706017792, 8373471727881913239760

Offset

1,1

Comments

Diagonal of A233892

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for n=3
..5..3..5..6....1..3..1..0....5..3..5..3....2..1..2..1....5..4..1..4
..4..0..1..3....5..2..5..2....1..0..4..0....6..4..6..3....2..6..2..6
..1..2..5..2....4..6..4..6....5..3..5..3....2..5..2..1....1..4..1..4
..4..6..4..0....1..2..1..5....1..0..4..0....6..4..6..3....5..6..5..3

Crossrefs

Sequence in context: A210300 A210293 A203915 * A246895 A188153 A163194

Adjacent sequences: A233881 A233882 A233883 * A233885 A233886 A233887

Keyword

nonn

Author

R. H. Hardin, Dec 17 2013

Status

approved