A203666 Number of (n+1)X3 0..6 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) nondecreasing in column and row directions, respectively

10530, 317138, 6780455, 108864887, 1447373824, 16256618529, 160492711072, 1415401335585, 11371075234194, 84200211332970, 581264413055940, 3772153171756957, 23184385843754255, 135761903090909843

Offset

1,1

Comments

Column 2 of A203672

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A120500 A371623 A157487 * A346892 A119866 A292703

Adjacent sequences: A203663 A203664 A203665 * A203667 A203668 A203669

Keyword

nonn

Author

R. H. Hardin Jan 04 2012

Status

approved