A198538 T(n,k)=Number of 2nX2k 0..4 arrays with values 0..4 introduced in row major order and each element equal to an even number of horizontal and vertical neighbors.

5, 404, 404, 67442, 7937268, 67442, 11739910, 163506788110, 163506788110, 11739910, 2048681430, 3368739754955320, 397739142470871040, 3368739754955320, 2048681430, 357559607382, 69406373651979823710

Offset

1,1

Comments

Table starts

............5..................404....................67442

..........404..............7937268.............163506788110

........67442.........163506788110.......397739142470871040

.....11739910.....3368739754955320.967523967174230258261646

...2048681430.69406373651979823710

.357559607382

Links

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

Example

Some solutions for n=3 k=2
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..1..2..0....0..1..2..0....0..1..2..0....0..1..2..0....0..1..2..0
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..1..3..2..3....3..1..2..2....3..1..2..2....1..3..2..3....2..3..2..3
..0..4..0..0....1..0..2..2....1..0..2..2....3..4..0..4....1..0..3..0
..3..1..0..0....0..4..3..1....2..1..0..4....2..0..4..0....2..1..0..3

Crossrefs

Sequence in context: A079011 A195502 A189307 * A198535 A128866 A221047

Adjacent sequences: A198535 A198536 A198537 * A198539 A198540 A198541

Keyword

nonn,tabl

Author

R. H. Hardin, Oct 26 2011

Status

approved