A203659 Number of (n+1)X4 0..7 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

557544, 729677481, 949250483640, 931767180207600, 726872783930414289, 471365844803377449537, 262105944532315606219051, 127751064516107688116280866, 55480436643156269714887269348

Offset

1,1

Comments

Column 3 of A203661

Links

R. H. Hardin, Table of n, a(n) for n = 1..54

Example

Some solutions for n=5
..7..2..2..2....5..2..7..3....3..0..5..3....7..5..7..7....4..1..1..2
..2..7..7..7....0..7..3..7....0..6..4..6....5..7..6..6....0..5..5..7
..7..3..5..5....1..7..7..3....1..5..5..5....5..7..6..6....3..3..3..7
..3..7..6..6....7..2..0..7....3..3..7..6....5..7..6..6....4..2..4..6
..3..7..6..6....3..6..4..4....6..2..6..5....5..7..6..6....2..5..5..0
..4..6..7..7....2..7..3..5....5..5..2..2....6..6..7..7....3..4..6..1

Crossrefs

Sequence in context: A272133 A202720 A235969 * A184475 A233916 A206194

Adjacent sequences: A203656 A203657 A203658 * A203660 A203661 A203662

Keyword

nonn

Author

R. H. Hardin Jan 04 2012

Status

approved