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 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 4
 5, 404, 404, 67442, 7937268, 67442, 11739910, 163506788110, 163506788110, 11739910, 2048681430, 3368739754955320, 397739142470871040, 3368739754955320, 2048681430, 357559607382, 69406373651979823710 (list; table; graph; refs; listen; history; text; internal format)
 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

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Last modified August 14 13:26 EDT 2020. Contains 336480 sequences. (Running on oeis4.)