A198911 Number of nX5 0..7 arrays with values 0..7 introduced in row major order and no element equal to any horizontal or vertical neighbor

15, 10867, 54381563, 481871809749, 4717456775959530, 46891073386615240710, 467181941240736711604077, 4656280284540702751242128730, 46410545076265038917843608182171, 462591920649454036671348839366018986

Offset

1,1

Comments

Column 5 of A198914

Links

R. H. Hardin, Table of n, a(n) for n = 1..24

Example

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

Crossrefs

Sequence in context: A198720 A140285 A208401 * A207867 A206513 A271404

Adjacent sequences: A198908 A198909 A198910 * A198912 A198913 A198914

Keyword

nonn

Author

R. H. Hardin Oct 31 2011

Status

approved