A237898 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum minus the upper median of every 2X2 subblock equal

256, 1848, 1848, 13600, 32404, 13600, 103536, 563534, 563534, 103536, 789664, 10390072, 21793104, 10390072, 789664, 6082368, 192679586, 925593210, 925593210, 192679586, 6082368, 46779520, 3656111168, 39591208852, 96197188500

Offset

1,1

Comments

Table starts

......256........1848..........13600.............103536................789664

.....1848.......32404.........563534...........10390072.............192679586

....13600......563534.......21793104..........925593210...........39591208852

...103536....10390072......925593210........96197188500........10123093733560

...789664...192679586....39591208852.....10123093733560......2609219234341504

..6082368..3656111168..1751486936860...1119144506661036....711963930145555688

.46779520.69880910510.78473090681640.125774053477877970.196763957644331216116

Links

R. H. Hardin, Table of n, a(n) for n = 1..112

Formula

Empirical for column k:

k=1: [linear recurrence of order 19]

k=2: [order 47]

Example

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

Crossrefs

Sequence in context: A238140 A238298 A238293 * A237891 A237158 A237151

Adjacent sequences: A237895 A237896 A237897 * A237899 A237900 A237901

Keyword

nonn,tabl

Author

R. H. Hardin, Feb 15 2014

Status

approved