A203027 Number of nX3 0..3 arrays with row sums equal and column sums unequal to adjacent columns

36, 396, 4740, 50716, 578696, 6829968, 77256180, 900837948, 10744263240, 124084485456, 1463920739636, 17570679180208, 205416961911028, 2441375153064180, 29416331612748560, 346614764617651324

Offset

1,1

Comments

Column 3 of A203031

Links

R. H. Hardin, Table of n, a(n) for n = 1..67

Example

Some.solutions.for.n=5
..0..1..0....0..2..0....3..3..1....2..2..0....2..1..0....3..2..3....1..1..1
..0..0..1....0..1..1....2..3..2....0..1..3....2..1..0....2..3..3....0..1..2
..0..0..1....0..2..0....1..3..3....3..0..1....1..0..2....2..3..3....3..0..0
..0..1..0....1..0..1....1..3..3....1..1..2....2..0..1....2..3..3....2..0..1
..0..0..1....2..0..0....3..1..3....3..1..0....2..0..1....2..3..3....0..1..2

Crossrefs

Sequence in context: A095682 A083811 A086575 * A164583 A273229 A264361

Adjacent sequences: A203024 A203025 A203026 * A203028 A203029 A203030

Keyword

nonn

Author

R. H. Hardin Dec 27 2011

Status

approved