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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

R. H. Hardin, Table of n, a(n) for n = 1..31

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

Adjacent sequences:  A203484 A203485 A203486 * A203488 A203489 A203490

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 02 2012

STATUS

approved

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Last modified July 21 22:02 EDT 2019. Contains 325210 sequences. (Running on oeis4.)