login
A236710
T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the maximum plus the upper median minus the lower median of every 2X2 subblock
6
81, 442, 442, 2464, 3492, 2464, 13720, 27406, 27406, 13720, 76404, 216340, 313360, 216340, 76404, 424600, 1707838, 3607280, 3607280, 1707838, 424600, 2361716, 13499232, 42032622, 62377580, 42032622, 13499232, 2361716, 13136192, 106577620
OFFSET
1,1
COMMENTS
Table starts
........81.........442..........2464...........13720...........76404
.......442........3492.........27406..........216340.........1707838
......2464.......27406........313360.........3607280........42032622
.....13720......216340.......3607280........62377580......1099360056
.....76404.....1707838......42032622......1099360056.....29705776060
....424600....13499232.....489450096.....19356846358....800348545256
...2361716...106577620....5684197999....338611786558..21427121287833
..13136192...841345444...65906387212...5938320805688.575347045288652
..73071732..6643410412..766873371754.104483857316574
.406402784.52475002544.8913443952908
LINKS
FORMULA
Empirical for column k:
k=1: [linear recurrence of order 19]
k=2: [order 59] for n>60
EXAMPLE
Some solutions for n=2 k=4
..0..2..0..0..1....1..1..0..0..2....0..0..1..0..2....0..0..2..2..0
..1..0..0..0..2....0..0..0..2..0....0..0..2..1..0....1..1..0..2..1
..1..1..2..0..2....1..0..0..2..1....0..1..1..2..1....0..1..2..1..0
CROSSREFS
Sequence in context: A017630 A270538 A230064 * A236705 A253749 A253375
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jan 30 2014
STATUS
approved