A187674 Number of (n+2)X3 0..3 arrays with no 2X2 subblock sum equal to any diagonal or antidiagonal neighbor 2X2 subblock sum

192960, 9136352, 433713824, 20581985952, 976666568320, 46345923682624, 2199263749025344, 104362111586399568, 4952316502117068152, 235003286495369796248, 11151658949655222403240, 529181949354720821420856

Offset

1,1

Comments

Column 1 of A187676

Links

R. H. Hardin, Table of n, a(n) for n = 1..136

Example

Some solutions for 4X3
..0..0..2....0..2..0....0..0..0....0..0..0....2..2..2....2..2..0....2..2..0
..0..2..2....2..2..2....2..0..0....0..0..2....2..0..0....0..2..0....2..2..2
..0..3..2....2..2..3....2..2..2....3..1..0....3..1..2....0..3..2....2..3..2
..2..2..3....2..0..0....0..3..3....2..1..1....3..1..3....2..1..0....1..0..2

Crossrefs

Sequence in context: A270971 A234455 A187676 * A252950 A250689 A234196

Adjacent sequences: A187671 A187672 A187673 * A187675 A187676 A187677

Keyword

nonn

Author

R. H. Hardin Mar 12 2011

Status

approved