A203031 T(n,k)=Number of nXk 0..3 arrays with row sums equal and column sums unequal to adjacent columns

4, 12, 4, 36, 28, 4, 108, 396, 120, 4, 324, 4904, 4740, 356, 4, 972, 57100, 191208, 50716, 1472, 4, 2916, 690204, 8536230, 7788648, 578696, 4780, 4, 8748, 8590508, 396419436, 1267847188, 315135868, 6829968, 20228, 4, 26244, 107540900, 18828234948

Offset

1,1

Comments

Table starts

.4.....12........36..........108............324.............972...........2916

.4.....28.......396.........4904..........57100..........690204........8590508

.4....120......4740.......191208........8536230.......396419436....18828234948

.4....356.....50716......7788648.....1267847188....219705087676.39711390609500

.4...1472....578696....315135868...189412482924.122284278712812

.4...4780...6829968..13106373164.28369308592126

.4..20228..77256180.539443637988

.4..68724.900837948

.4.296256

.4

Links

R. H. Hardin, Table of n, a(n) for n = 1..58

Example

Some.solutions.for.n=5.k=3
..2..3..0....1..1..3....2..2..2....3..0..2....1..3..2....0..2..3....2..0..1
..0..3..2....2..0..3....0..3..3....2..0..3....2..2..2....3..0..2....2..1..0
..2..0..3....2..3..0....3..0..3....3..0..2....1..2..3....0..2..3....1..0..2
..2..3..0....2..1..2....0..3..3....0..3..2....1..2..3....2..3..0....3..0..0
..2..3..0....0..3..2....0..3..3....3..0..2....3..0..3....3..0..2....1..1..1

Crossrefs

Sequence in context: A255289 A348334 A337403 * A336862 A190392 A133517

Adjacent sequences: A203028 A203029 A203030 * A203032 A203033 A203034

Keyword

nonn,tabl

Author

R. H. Hardin Dec 27 2011

Status

approved