A206502 Number of nX5 0..7 arrays with no element equal to another within a city block distance of two, and new values 0..7 introduced in row major order

5, 481, 178998, 83045488, 38638317841

Offset

1,1

Comments

Column 5 of A206503

Links

Table of n, a(n) for n=1..5.

Example

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

Crossrefs

Sequence in context: A024071 A321939 A198978 * A198249 A160363 A268113

Adjacent sequences: A206499 A206500 A206501 * A206503 A206504 A206505

Keyword

nonn

Author

R. H. Hardin Feb 08 2012

Status

approved