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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 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

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