A234413 Number of (n+1)X(n+1) 0..7 arrays with every 2X2 subblock having the absolute values of all six edge and diagonal differences no larger than 1

106, 5606, 1131708, 902381482, 2857237950632, 36116482489037416, 1828227876741151008626, 371458871749141017729716430, 303446808354142538935528752787416

Offset

1,1

Comments

Diagonal of A234421

Links

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

Example

Some solutions for n=2
..3..4..3....3..2..3....1..0..0....5..5..5....6..7..7....2..2..2....6..6..6
..3..3..3....3..2..3....0..0..0....6..6..5....7..6..6....2..2..1....5..5..6
..2..3..3....2..3..3....0..1..0....5..6..5....7..7..6....1..2..2....6..6..5

Crossrefs

Sequence in context: A233047 A206755 A200969 * A083963 A166912 A223497

Adjacent sequences: A234410 A234411 A234412 * A234414 A234415 A234416

Keyword

nonn

Author

R. H. Hardin, Dec 25 2013

Status

approved