A203450 Number of (n+1)X7 0..1 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

256, 786, 13777, 265581, 5972476, 125140148, 2396938985, 41222650083, 637232759390, 8897124488034, 112983830198944, 1314391834428984, 14104514485212071, 140489745680450603, 1306284213152732426

Offset

1,1

Comments

Column 6 of A203452

Links

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

Example

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

Crossrefs

Sequence in context: A045057 A195091 A361176 * A188248 A253822 A258733

Adjacent sequences: A203447 A203448 A203449 * A203451 A203452 A203453

Keyword

nonn

Author

R. H. Hardin Jan 02 2012

Status

approved