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A203031 T(n,k)=Number of nXk 0..3 arrays with row sums equal and column sums unequal to adjacent columns 12
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 (list; table; graph; refs; listen; history; text; internal format)
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
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
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Dec 27 2011
STATUS
approved

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Last modified December 3 21:20 EST 2023. Contains 367540 sequences. (Running on oeis4.)