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A205362 Number of (n+1)X(n+1) 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock the same 0
256, 31848, 17552984, 50678667832, 816001498671156, 67662059756253796792, 27502351524660234481657420 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A205370

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A181243 A205634 A269292 * A206101 A221091 A205458

Adjacent sequences: A205359 A205360 A205361 * A205363 A205364 A205365

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 26 2012

STATUS

approved

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Last modified March 31 05:47 EDT 2023. Contains 361634 sequences. (Running on oeis4.)