A203785 Number of (n+1)X7 0..3 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) such that rows of b(i,j) and columns of c(i,j) are lexicographically nondecreasing

452825, 439011778, 1799006388496, 7419043577516162, 25396150957664543872, 71462394089059338306691

Offset

1,1

Comments

Column 6 of A203787

Links

Table of n, a(n) for n=1..6.

Example

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

Crossrefs

Sequence in context: A227702 A210332 A209714 * A134960 A134888 A237867

Adjacent sequences: A203782 A203783 A203784 * A203786 A203787 A203788

Keyword

nonn

Author

R. H. Hardin Jan 05 2012

Status

approved