A236198 T(n,k) = Number of (n+1) X (k+1) 0..3 arrays colored with the upper median plus the lower median minus the minimum of every 2 X 2 subblock.

256, 2936, 2936, 33546, 76340, 33546, 384948, 1971348, 1971348, 384948, 4420718, 51179036, 114241318, 51179036, 4420718, 50726030, 1330663048, 6664918820, 6664918820, 1330663048, 50726030, 582030405, 34586439766, 390311787452

Offset

1,1

Comments

Table starts

.......256........2936........33546.......384948......4420718.......50726030

......2936.......76340......1971348.....51179036...1330663048....34586439766

.....33546.....1971348....114241318...6664918820.390311787452.22840834091972

....384948....51179036...6664918820.877681520828

...4420718..1330663048.390311787452

..50726030.34586439766

.582030405

Links

R. H. Hardin, Table of n, a(n) for n = 1..31

Formula

Empirical for column k:

k=1: [linear recurrence of order 37].

Example

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

Crossrefs

Sequence in context: A236657 A235579 A236654 * A236195 A236592 A236589

Adjacent sequences: A236195 A236196 A236197 * A236199 A236200 A236201

Keyword

nonn,tabl

Author

R. H. Hardin, Jan 20 2014

Status

approved