A183975 Half the number of (n+1)X5 0..3 arrays with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one

64976, 2735260, 124987628, 6533126804, 347446206704, 19440886672754, 1094585980533770, 63025132086371298, 3637470871443612084

Offset

1,1

Comments

Column 4 of A183976

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for 3X5
..1..1..0..1..0....1..1..0..0..1....1..0..1..0..0....2..1..1..0..1
..3..0..3..1..3....1..0..2..1..2....0..0..1..0..2....1..0..2..1..1
..0..1..1..0..0....1..1..1..0..2....0..0..0..0..0....1..1..0..0..2
...
...5..4..5..5.......3..3..3..4.......1..2..2..2.......4..4..4..3...
...4..5..5..4.......3..4..4..5.......0..1..1..2.......3..3..3..4...

Crossrefs

Sequence in context: A342327 A198779 A104939 * A234908 A204640 A015344

Adjacent sequences: A183972 A183973 A183974 * A183976 A183977 A183978

Keyword

nonn

Author

R. H. Hardin Jan 08 2011

Status

approved