A238064 Number of (n+1)X(n+1) 0..3 arrays with the maximum minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.

256, 16116, 2296588, 506608980, 323819924384, 448255641499780, 1736639229342029538, 13883769406039825746192

Offset

1,1

Comments

Diagonal of A238072

Links

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

Example

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

Crossrefs

Sequence in context: A269204 A224283 A224206 * A235964 A206319 A216397

Adjacent sequences: A238061 A238062 A238063 * A238065 A238066 A238067

Keyword

nonn

Author

R. H. Hardin, Feb 17 2014

Status

approved