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A203487 Number of nX4 0..2 arrays with row sums equal and column sums unequal to adjacent columns 1
24, 556, 9540, 173860, 3065704, 56438584, 1004305424, 18465834580, 335571341040, 6219202151476, 114039550489064, 2121345108007408, 39325546973748384, 735898709559550484, 13729000925046178840, 257888578347427756340 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A203491
LINKS
EXAMPLE
Some solutions for n=5
..0..0..1..2....1..1..2..2....1..1..1..1....2..2..2..0....2..1..1..0
..2..0..0..1....2..1..2..1....1..0..1..2....0..2..2..2....2..2..0..0
..2..0..0..1....2..1..2..1....2..1..0..1....0..2..2..2....0..1..2..1
..1..0..0..2....1..1..2..2....1..0..2..1....0..2..2..2....0..1..2..1
..2..0..0..1....1..1..2..2....1..0..1..2....1..1..2..2....2..0..2..0
CROSSREFS
Sequence in context: A170705 A170743 A218726 * A007110 A007109 A158538
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 02 2012
STATUS
approved

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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)