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A205432 Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having the same number of equal edges, and new values 0..3 introduced in row major order 0
15, 833, 302148, 869874577, 15852623627426, 1606623426666766016, 889483689986105362021688 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A205440

LINKS

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

EXAMPLE

Some solutions for n=4

..0..0..0..0..0....0..1..0..1..0....0..1..1..0..0....0..0..0..0..1

..0..1..0..1..0....0..0..0..0..0....1..1..0..0..1....0..1..0..1..1

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

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

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

CROSSREFS

Sequence in context: A230181 A187803 A261828 * A020240 A281695 A223276

Adjacent sequences:  A205429 A205430 A205431 * A205433 A205434 A205435

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 27 2012

STATUS

approved

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Last modified September 19 14:36 EDT 2020. Contains 337178 sequences. (Running on oeis4.)