A236979 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the upper median minus the minimum of every 2X2 subblock equal

256, 1238, 1238, 6024, 9854, 6024, 31008, 76212, 76212, 31008, 160764, 635960, 898820, 635960, 160764, 849024, 5259146, 11850502, 11850502, 5259146, 849024, 4508480, 44597946, 151656752, 255242808, 151656752, 44597946, 4508480

Offset

1,1

Comments

Table starts

.......256.........1238...........6024.............31008..............160764

......1238.........9854..........76212............635960.............5259146

......6024........76212.........898820..........11850502...........151656752

.....31008.......635960.......11850502.........255242808..........5254828598

....160764......5259146......151656752........5254828598........170660727666

....849024.....44597946.....2025835812......114693934002.......5994744923828

...4508480....376887360....26630922346.....2439448423018.....202811270105808

..24165576...3222991866...357532653542....53441614415488....7144432229593312

.130044760..27520095568..4755836009162..1152443005857246..246010325366345250

.703680344.236568864708.64003985025026.25269245393970820.8667717995726131218

Links

R. H. Hardin, Table of n, a(n) for n = 1..111

Formula

Empirical for column k:

k=1: [linear recurrence of order 39]

Example

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

Crossrefs

Sequence in context: A237204 A237007 A237000 * A236973 A237956 A237241

Adjacent sequences: A236976 A236977 A236978 * A236980 A236981 A236982

Keyword

nonn,tabl

Author

R. H. Hardin, Feb 02 2014

Status

approved