A236127 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays colored with the maximum plus the upper median minus the lower median of every 2X2 subblock

256, 2782, 2782, 30660, 65360, 30660, 337810, 1546388, 1546388, 337810, 3723012, 36646316, 79435700, 36646316, 3723012, 41005528, 867557598, 4076346506, 4076346506, 867557598, 41005528, 451716944, 20540949574, 209227480445

Offset

1,1

Comments

Table starts

........256.........2782..........30660.........337810........3723012

.......2782........65360........1546388.......36646316......867557598

......30660......1546388.......79435700.....4076346506...209227480445

.....337810.....36646316.....4076346506...454310298366.50611825632254

....3723012....867557598...209227480445.50611825632254

...41005528..20540949574.10737439549324

..451716944.486339042016

.4976199592

Links

R. H. Hardin, Table of n, a(n) for n = 1..39

Formula

Empirical for column k:

k=1: [linear recurrence of order 40]

Example

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

Crossrefs

Sequence in context: A236315 A205422 A205417 * A236124 A236949 A236942

Adjacent sequences: A236124 A236125 A236126 * A236128 A236129 A236130

Keyword

nonn,tabl

Author

R. H. Hardin, Jan 19 2014

Status

approved