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

0, 4, 13, 66, 158, 934, 2446, 14567, 39972, 240130, 673665, 4073862, 11545686, 70212506, 200446066, 1224207384, 3512430906, 21526789216, 62001340484, 381049009426, 1100824791540, 6780941436208, 19637801359798, 121196222602133

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: A266096 A005035 A340452 * A052415 A129433 A157311

Adjacent sequences: A222768 A222769 A222770 * A222772 A222773 A222774

Keyword

nonn

Author

R. H. Hardin Mar 05 2013

Status

approved