A187676 T(n,k) = Number of (n+2) X (k+2) 0..3 arrays with no 2 X 2 subblock sum equal to any diagonal or antidiagonal neighbor 2 X 2 subblock sum.

192960, 9136352, 9136352, 433713824, 1292583020, 433713824, 20581985952, 184351404608, 184351404608, 20581985952, 976666568320, 26257519475028, 79410378172576, 26257519475028, 976666568320, 46345923682624

Offset

1,1

Comments

Table starts

.........192960..........9136352.........433713824.......20581985952

........9136352.......1292583020......184351404608....26257519475028

......433713824.....184351404608....79410378172576.34116783462382978

....20581985952...26257519475028.34116783462382978

...976666568320.3739210796619416

.46345923682624

Links

R. H. Hardin, Table of n, a(n) for n = 1..23

Example

Some solutions for 5 X 4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..2..2..0..2....0..2..0..2....0..2..0..2....2..2..0..2....0..2..0..1
..1..1..3..3....0..2..3..0....1..1..0..2....1..1..0..1....0..3..3..1
..0..0..1..0....1..1..2..0....3..3..2..3....3..0..1..2....1..2..2..1

Crossrefs

Sequence in context: A204228 A270971 A234455 * A187674 A252950 A250689

Adjacent sequences: A187673 A187674 A187675 * A187677 A187678 A187679

Keyword

nonn,tabl

Author

R. H. Hardin Mar 12 2011

Status

approved