A203562 Number of n X 6 0..2 arrays with row sums equal and column sums equal.

3, 183, 10833, 513903, 39612503, 8459809773, 360255871643, 37057831534783, 4131064166006823, 431284911997558083, 48321459222257750543

Offset

1,1

Links

Table of n, a(n) for n=1..11.

Example

Some solutions for n=5:
..2..1..0..2..1..0....2..0..2..2..0..0....0..2..1..0..2..1....1..2..1..1..0..1
..0..1..0..2..2..1....2..0..0..1..2..1....1..0..1..1..1..2....1..2..2..1..0..0
..0..0..1..1..2..2....1..1..2..0..0..2....2..2..2..0..0..0....1..1..1..1..1..1
..1..1..2..0..0..2....0..2..0..0..2..2....1..0..0..2..2..1....1..0..1..1..2..1
..2..2..2..0..0..0....0..2..1..2..1..0....1..1..1..2..0..1....1..0..0..1..2..2

Crossrefs

Column 6 of A203564.

Sequence in context: A013519 A042779 A103503 * A371153 A198701 A157561

Adjacent sequences: A203559 A203560 A203561 * A203563 A203564 A203565

Keyword

nonn,more,changed

Author

R. H. Hardin, Jan 03 2012

Status

approved