A236319 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays colored with the maximum plus the lower median minus the minimum of every 2X2 subblock

256, 2744, 2744, 29670, 61262, 29670, 319908, 1362884, 1362884, 319908, 3455790, 30415198, 62811760, 30415198, 3455790, 37315466, 680489392, 2909136874, 2909136874, 680489392, 37315466, 402944837, 15223905144, 135542325383

Offset

1,1

Comments

Table starts

........256.........2744.........29670.........319908........3455790

.......2744........61262.......1362884.......30415198......680489392

......29670......1362884......62811760.....2909136874...135542325383

.....319908.....30415198....2909136874...282120064310.27555967936654

....3455790....680489392..135542325383.27555967936654

...37315466..15223905144.6305164652408

..402944837.340350445264

.4350716716

Links

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

Formula

Empirical for column k:

k=1: [linear recurrence of order 37]

Example

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

Crossrefs

Sequence in context: A235749 A236596 A236593 * A236315 A205422 A205417

Adjacent sequences: A236316 A236317 A236318 * A236320 A236321 A236322

Keyword

nonn,tabl

Author

R. H. Hardin, Jan 22 2014

Status

approved