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A205927 Number of (n+1)X(n+1) 0..3 arrays with the number of clockwise edge increases in 2X2 subblocks nondecreasing rightwards and downwards 0
256, 95888, 164649752, 1235093642064, 40748437316237404, 5953229517409280684864 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A205935

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for n=4

..1..0..3..3..3....0..0..1..1..1....3..2..2..0..1....3..0..1..1..1

..2..2..2..2..2....1..2..0..3..2....2..0..3..1..2....1..2..0..3..2

..3..2..3..3..1....0..0..3..2..1....1..1..0..2..3....1..3..1..0..3

..1..2..1..0..2....2..1..0..3..2....3..2..1..0..2....3..0..2..1..0

..1..3..2..1..3....3..2..1..0..3....2..1..2..1..0....1..1..3..2..1

CROSSREFS

Sequence in context: A264347 A223199 A207295 * A223354 A236941 A222141

Adjacent sequences:  A205924 A205925 A205926 * A205928 A205929 A205930

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 01 2012

STATUS

approved

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Last modified August 16 00:08 EDT 2022. Contains 356150 sequences. (Running on oeis4.)