A205019 Number of (n+1)X(n+1) 0..3 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards

256, 27611, 7148335, 11646996582, 69845358912381, 2391551925319245318, 235682549037000868908322, 159301222429065945412750692320

Offset

1,1

Comments

Diagonal of A205027

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A237134 A205948 A309827 * A017212 A181243 A205634

Adjacent sequences: A205016 A205017 A205018 * A205020 A205021 A205022

Keyword

nonn

Author

R. H. Hardin Jan 21 2012

Status

approved