A220388 Majority value maps: number of 3Xn binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal and antidiagonal neighbors in a random 0..1 3Xn array

1, 21, 136, 757, 5114, 33247, 211944, 1358599, 8710809, 55837516, 357929465, 2294335738, 14706528192, 94267737477, 604248583206, 3873181842138, 24826757202429, 159137319721129, 1020056076249840, 6538468564699587

Offset

1,2

Comments

Row 3 of A220386

Links

R. H. Hardin, Table of n, a(n) for n = 1..67

Example

Some solutions for n=3
..1..0..1....0..0..0....0..0..1....1..0..1....0..0..0....0..0..1....1..1..1
..1..1..0....1..1..1....1..1..0....1..1..1....1..1..0....0..1..0....0..1..0
..0..0..0....1..0..0....1..0..0....1..1..1....1..0..0....1..1..1....1..1..1

Crossrefs

Sequence in context: A125331 A126489 A033595 * A220151 A337899 A200987

Adjacent sequences: A220385 A220386 A220387 * A220389 A220390 A220391

Keyword

nonn

Author

R. H. Hardin Dec 13 2012

Status

approved