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A222321 Number of n X n 0..1 arrays with exactly floor(n X n/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..1 order 0
1, 0, 4, 52, 674, 38238, 2284728, 620488671, 174162198742, 206752746752932 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Diagonal of A222328

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A155661 A198281 A220933 * A222138 A006760 A144340

Adjacent sequences:  A222318 A222319 A222320 * A222322 A222323 A222324

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 15 2013

STATUS

approved

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Last modified January 17 22:33 EST 2022. Contains 350410 sequences. (Running on oeis4.)