A203963 Number of (n+1)X7 0..2 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

17559, 1512850, 632607409, 307121002440, 136086136646160, 50733485047025530, 16109192511515893766, 4433254841709522719831, 1076635072887512457016009, 234146141872612907753307731, 46148223719533101091238412472

Offset

1,1

Comments

Column 6 of A203965

Links

R. H. Hardin, Table of n, a(n) for n = 1..43

Example

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

Crossrefs

Sequence in context: A321640 A083599 A049521 * A253403 A213107 A167190

Adjacent sequences: A203960 A203961 A203962 * A203964 A203965 A203966

Keyword

nonn

Author

R. H. Hardin Jan 08 2012

Status

approved