A235752 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the sum of each 2X2 subblock two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise

256, 2648, 2648, 26852, 77708, 26852, 231182, 2349533, 2349533, 231182, 1922672, 57181902, 214506660, 57181902, 1922672, 14817810, 1348418217, 15727633969, 15727633969, 1348418217, 14817810, 110573053, 28136789021, 1128357765708

Offset

1,1

Comments

Table starts

.......256.........2648..........26852..........231182.........1922672

......2648........77708........2349533........57181902......1348418217

.....26852......2349533......214506660.....15727633969...1128357765708

....231182.....57181902....15727633969...3701898746432.876099571684741

...1922672...1348418217..1128357765708.876099571684741

..14817810..28136789021.70340776990634

.110573053.560792477177

.791130664

Links

R. H. Hardin, Table of n, a(n) for n = 1..40

Formula

Empirical for column k:

k=1: [linear recurrence of order 32]

Example

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

Crossrefs

Sequence in context: A236620 A236505 A236501 * A235815 A235749 A236596

Adjacent sequences: A235749 A235750 A235751 * A235753 A235754 A235755

Keyword

nonn,tabl

Author

R. H. Hardin, Jan 15 2014

Status

approved