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A222772 Number of 4Xn 0..1 arrays with exactly floor(4Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order 1
0, 20, 96, 465, 2608, 15077, 89811, 544302, 3349328, 20823047, 130535918, 823585242, 5221057054, 33231082276, 212180118775, 1358528423728, 8718262087314, 56062919553225, 361148981248207, 2330144611056838 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 4 of A222769

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..45

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A126407 A158446 A221704 * A267646 A264424 A039610

Adjacent sequences:  A222769 A222770 A222771 * A222773 A222774 A222775

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 05 2013

STATUS

approved

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Last modified July 20 01:17 EDT 2019. Contains 325168 sequences. (Running on oeis4.)