A187675 Number of (n+2)X4 0..3 arrays with no 2X2 subblock sum equal to any diagonal or antidiagonal neighbor 2X2 subblock sum

9136352, 1292583020, 184351404608, 26257519475028, 3739210796619416, 532523771629995532, 75840322054047845954, 10800899342885484556064, 1538224290587862925230372, 219068281015870859530254112

Offset

1,1

Comments

Column 2 of A187676

Links

R. H. Hardin, Table of n, a(n) for n = 1..55

Example

Some solutions for 6X4
..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
..0..2..0..2....0..2..0..2....0..2..0..2....0..2..0..2....0..2..0..2
..1..0..2..0....1..0..2..2....2..0..2..2....1..0..2..2....2..0..2..0
..1..3..1..2....2..3..0..1....0..0..3..1....2..2..0..1....2..2..3..1
..2..1..1..0....3..3..2..3....0..0..1..1....2..3..1..1....3..2..3..2

Crossrefs

Sequence in context: A233613 A172620 A172711 * A205615 A251399 A206599

Adjacent sequences: A187672 A187673 A187674 * A187676 A187677 A187678

Keyword

nonn

Author

R. H. Hardin Mar 12 2011

Status

approved