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A222771 Number of 3Xn 0..1 arrays with exactly floor(3Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order 1
0, 4, 13, 66, 158, 934, 2446, 14567, 39972, 240130, 673665, 4073862, 11545686, 70212506, 200446066, 1224207384, 3512430906, 21526789216, 62001340484, 381049009426, 1100824791540, 6780941436208, 19637801359798, 121196222602133 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 3 of A222769

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..48

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A287145 A266096 A005035 * A052415 A129433 A157311

Adjacent sequences:  A222768 A222769 A222770 * A222772 A222773 A222774

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 05 2013

STATUS

approved

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Last modified July 22 14:33 EDT 2019. Contains 325222 sequences. (Running on oeis4.)