A183976 T(n,k)=Half the number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one

128, 992, 992, 7688, 13168, 7688, 64976, 180236, 180236, 64976, 549152, 2735260, 4470575, 2735260, 549152, 4780976, 41834260, 124987628, 124987628, 41834260, 4780976, 41623688, 664848772, 3536846184, 6533126804, 3536846184, 664848772

Offset

1,1

Comments

Table starts

.......128.........992.........7688........64976.......549152........4780976

.......992.......13168.......180236......2735260.....41834260......664848772

......7688......180236......4470575....124987628...3536846184...104681141079

.....64976.....2735260....124987628...6533126804.347446206704.19440886672754

....549152....41834260...3536846184.347446206704

...4780976...664848772.104681141079

..41623688.10590791696

.366310352

Links

R. H. Hardin, Table of n, a(n) for n = 1..40

Example

Some solutions for 3X3
..2..0..0....3..0..3....2..3..0....1..0..1....2..3..1....3..1..2....1..1..2
..0..3..2....2..2..2....2..0..3....1..0..1....1..3..2....1..3..3....2..3..2
..2..0..1....3..1..2....3..1..2....0..1..1....3..2..2....2..2..1....2..1..2
...
...5..5.......7..7.......7..6.......2..2.......9..9.......8..9.......7..8...
...5..6.......8..7.......6..6.......2..3.......9..9.......8..9.......8..8...

Crossrefs

Sequence in context: A188841 A188704 A297344 * A183972 A143708 A130813

Adjacent sequences: A183973 A183974 A183975 * A183977 A183978 A183979

Keyword

nonn,tabl

Author

R. H. Hardin Jan 08 2011

Status

approved