A204333 Number of (n+1) X 3 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) nondecreasing in column and row directions, respectively.

22294, 947240, 28167739, 618981328, 11129487382, 167047130892, 2182013404785, 25223785164840, 263429302921267, 2516401943818334, 22254660740122213, 183832573199251582, 1429690614799434987, 10535427034666117628

Offset

1,1

Comments

Column 2 of A204339.

Links

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

Example

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

Crossrefs

Sequence in context: A204148 A251825 A119568 * A252774 A253042 A216202

Adjacent sequences: A204330 A204331 A204332 * A204334 A204335 A204336

Keyword

nonn

Author

R. H. Hardin, Jan 14 2012

Status

approved