A234428 T(n,k)=Number of (n+1)X(k+1) 0..7 arrays with every 2X2 subblock having the sum of the absolute values of the edge differences equal to 14 and no adjacent elements equal

448, 4516, 4516, 44140, 89844, 44140, 453728, 1729584, 1729584, 453728, 4641220, 37628800, 58371648, 37628800, 4641220, 47946684, 828368064, 2539059832, 2539059832, 828368064, 47946684, 494928936, 18660740184, 109799236808

Offset

1,1

Comments

Table starts

.......448.........4516...........44140.............453728.............4641220

......4516........89844.........1729584...........37628800...........828368064

.....44140......1729584........58371648.........2539059832........109799236808

....453728.....37628800......2539059832.......246163893400......23699592729240

...4641220....828368064....109799236808.....23699592729240....4893587565262048

..47946684..18660740184...5083291722008...2541252995824388.1189817781122853232

.494928936.422356863016.236294724920980.274279786722927952

Links

R. H. Hardin, Table of n, a(n) for n = 1..60

Formula

Empirical for column k:

k=1: [linear recurrence of order 12]

k=2: [order 68]

Example

Some solutions for n=2 k=4
..2..7..1..7..0....4..7..6..1..3....4..7..4..7..1....4..7..3..1..6
..0..1..0..4..2....0..1..7..0..7....0..1..0..4..0....0..1..0..5..3
..2..7..3..0..5....2..7..6..3..4....2..7..4..7..6....2..7..1..7..0

Crossrefs

Sequence in context: A234438 A048632 A366815 * A234424 A234175 A234170

Adjacent sequences: A234425 A234426 A234427 * A234429 A234430 A234431

Keyword

nonn,tabl

Author

R. H. Hardin, Dec 25 2013

Status

approved