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A205019 Number of (n+1)X(n+1) 0..3 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards 0
256, 27611, 7148335, 11646996582, 69845358912381, 2391551925319245318, 235682549037000868908322, 159301222429065945412750692320 (list; graph; refs; listen; history; text; internal format)
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

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Last modified November 29 21:32 EST 2021. Contains 349416 sequences. (Running on oeis4.)