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A268016
Number of nX4 0..2 arrays with every repeated value in every row and column greater than or equal to the previous repeated value.
1
78, 6084, 474552, 31831908, 2012075697, 119453097281, 6761580343329, 367501986337710, 19300005472710895, 983989084426524929, 48888960624425750151, 2374418848334124952354, 113014440791056538695922
OFFSET
1,1
COMMENTS
Column 4 of A268019.
LINKS
EXAMPLE
Some solutions for n=2
..2..1..0..0....2..1..2..1....0..2..2..2....2..1..1..1....0..2..1..1
..2..1..0..2....0..1..0..2....1..0..2..1....2..0..2..2....2..0..1..1
CROSSREFS
Cf. A268019.
Sequence in context: A093278 A328354 A268023 * A077694 A119216 A119236
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 24 2016
STATUS
approved