A235824 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the difference of the upper median and minimum value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise

256, 2896, 2896, 29902, 91067, 29902, 283672, 2623192, 2571976, 283672, 2573798, 66311937, 207321076, 64246449, 2573798, 22515040, 1570352593, 14451129835, 14397784435, 1503158739, 22515040, 192101098, 34846608905, 941802350503

Offset

1,1

Comments

Table starts

........256.........2896..........29902..........283672.........2573798

.......2896........91067........2623192........66311937......1570352593

......29902......2571976......207321076.....14451129835....941802350503

.....283672.....64246449....14397784435...2855211911294.542901316539098

....2573798...1503158739...927626379839.532865298104737

...22515040..33037099974.55289364866072

..192101098.695342067696

.1606970816

Links

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

Example

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

Crossrefs

Column 1 and row 1 are A235579

Sequence in context: A235818 A235577 A235574 * A235582 A236657 A235579

Adjacent sequences: A235821 A235822 A235823 * A235825 A235826 A235827

Keyword

nonn,tabl

Author

R. H. Hardin, Jan 16 2014

Status

approved