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A205902 Number of (n+1)X(n+1) 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock the same 0
81, 2943, 327501, 103275303, 87381878025, 193311671549253, 1103442692933402073, 16171078560726954322707, 607154926010685736292686917 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A205909

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A253741 A253516 A038398 * A295252 A295651 A143652

Adjacent sequences:  A205899 A205900 A205901 * A205903 A205904 A205905

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 01 2012

STATUS

approved

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Last modified October 15 18:26 EDT 2019. Contains 328037 sequences. (Running on oeis4.)