A238027 Number of (1+2)X(n+2) 0..1 arrays with the (lower) medians of each row unequal to its neighbors and each column equal to its neighbors

20, 74, 212, 828, 2312, 9178, 25652, 102356, 287960, 1150916, 3260168, 13037240, 37151120, 148591610, 425537780, 1702102500, 4894629560, 19578333484, 56494758872, 225978330056, 653985816944, 2615940563620, 7589574333512

Offset

1,1

Comments

Row 1 of A238026

Links

R. H. Hardin, Table of n, a(n) for n = 1..167

Example

Some solutions for n=5
..0..0..0..1..0..0..0....0..0..0..0..0..0..0....1..0..1..1..1..1..1
..1..0..0..0..1..1..1....0..0..1..1..1..0..1....1..1..0..0..0..1..0
..0..1..0..0..0..0..0....0..0..0..0..0..0..0....1..1..1..1..1..0..1

Crossrefs

Sequence in context: A010008 A237617 A000529 * A005565 A320484 A066126

Adjacent sequences: A238024 A238025 A238026 * A238028 A238029 A238030

Keyword

nonn

Author

R. H. Hardin, Feb 17 2014

Status

approved