A234028 Number of (n+1)X(n+1) 0..4 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1

61, 3059, 591711, 454996327, 1394283842243, 17100147398257787, 841477590887025128591, 166464986867345392587609693, 132584609704248220162949309257517

Offset

1,1

Comments

Diagonal of A234036

Links

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

Example

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

Crossrefs

Sequence in context: A078962 A000508 A191092 * A135647 A375893 A269025

Adjacent sequences: A234025 A234026 A234027 * A234029 A234030 A234031

Keyword

nonn

Author

R. H. Hardin, Dec 18 2013

Status

approved