A236142 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays colored with the maximum plus the upper median plus the minimum minus the lower median of every 2X2 subblock

256, 2976, 2976, 34734, 79260, 34734, 405132, 2113860, 2113860, 405132, 4726586, 56388240, 129107036, 56388240, 4726586, 55128306, 1503850638, 7882228972, 7882228972, 1503850638, 55128306, 643062117, 40110759152, 481223530251

Offset

1,1

Comments

Table starts

........256..........2976..........34734..........405132.........4726586

.......2976.........79260........2113860........56388240......1503850638

......34734.......2113860......129107036......7882228972....481223530251

.....405132......56388240.....7882228972...1102150639440.154055073024272

....4726586....1503850638...481223530251.154055073024272

...55128306...40110759152.29382547744580

..643062117.1069867016024

.7501428048

Links

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

Formula

Empirical for column k:

k=1: [linear recurrence of order 39]

Example

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

Crossrefs

Sequence in context: A236195 A236592 A236589 * A236139 A235747 A235506

Adjacent sequences: A236139 A236140 A236141 * A236143 A236144 A236145

Keyword

nonn,tabl

Author

R. H. Hardin, Jan 19 2014

Status

approved