A234123 Number of (n+1)X(n+1) 0..6 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1

91, 4757, 951709, 753253097, 2369586581169, 29777695096321851, 1499309201721436345531, 303126582922004534372454101, 246491114964153072540340892486965

Offset

1,1

Comments

Diagonal of A234131

Links

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

Example

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

Crossrefs

Sequence in context: A017754 A283383 A004380 * A103855 A238541 A217853

Adjacent sequences: A234120 A234121 A234122 * A234124 A234125 A234126

Keyword

nonn

Author

R. H. Hardin, Dec 19 2013

Status

approved