

A233405


Number of (n+1)X(4+1) 0..2 arrays with row and column sums nondecreasing, and no adjacent elements equal


0



24, 100, 360, 1907, 6931, 21765, 86233, 274628, 965494, 3146010, 10444724, 33097949, 108522965, 338311791, 1086568168, 3360254074, 10607088651, 32550672493, 101662193862
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OFFSET

1,1


COMMENTS

Column 4 of A233408


LINKS

Table of n, a(n) for n=1..19.


EXAMPLE

Some solutions for n=5
..0..2..0..1..0....2..0..1..2..0....0..2..0..2..0....0..1..0..2..0
..2..0..2..0..1....0..1..2..0..2....2..0..1..0..1....1..0..2..0..1
..0..2..0..1..2....1..0..1..2..1....0..1..2..1..0....0..2..0..2..0
..1..0..1..2..1....0..1..2..1..2....2..0..1..0..2....1..0..1..0..2
..0..1..2..0..2....1..2..0..2..1....0..2..0..2..1....0..2..0..2..1
..2..0..1..2..1....0..1..2..1..2....2..1..2..1..2....2..0..2..0..2


CROSSREFS

Sequence in context: A042126 A157514 A100152 * A297798 A048529 A213842
Adjacent sequences: A233402 A233403 A233404 * A233406 A233407 A233408


KEYWORD

nonn


AUTHOR

R. H. Hardin, Dec 09 2013


STATUS

approved



