A212949 Number of 7Xn 0..n-1 arrays with no column j greater than or equal to than column j-1 in all rows

1, 14197, 9245913139, 64146409058631061, 2592491557886605293297751, 427593510370812774462812710051387, 227328735342370296661661894900118524516359

Offset

1,2

Comments

Row 7 of A212943

Links

R. H. Hardin, Table of n, a(n) for n = 1..17

Example

Some solutions for n=4
..0..0..0..0....0..1..2..1....3..3..2..0....1..2..3..2....3..1..1..2
..1..0..1..3....1..1..0..2....0..2..1..1....3..1..1..1....0..1..0..0
..3..3..2..3....1..3..3..1....3..1..0..0....3..3..3..1....0..0..3..0
..0..3..0..2....2..0..2..2....1..0..2..3....3..1..3..3....1..1..2..0
..0..2..2..3....1..2..0..0....2..1..1..0....3..1..1..1....2..2..1..0
..0..0..0..3....1..0..2..2....3..3..0..1....3..2..3..0....3..2..2..0
..2..0..2..0....0..1..3..2....0..0..3..2....1..1..0..2....2..3..3..0

Crossrefs

Sequence in context: A254917 A270800 A271247 * A205202 A205060 A237541

Adjacent sequences: A212946 A212947 A212948 * A212950 A212951 A212952

Keyword

nonn

Author

R. H. Hardin May 31 2012

Status

approved