A238022 Number of (n+2)X(2+2) 0..1 arrays with the (lower) medians of each row unequal to its neighbors and each column equal to its neighbors

74, 310, 4730, 10362, 325418, 677750, 21958106, 53790778, 1439629634, 4161478414, 92041179386, 304213814986, 5765304183818, 21169795378678, 355195154002010, 1417559402402490, 21589075375711250, 92135427005690030

Offset

1,1

Comments

Column 2 of A238026

Links

R. H. Hardin, Table of n, a(n) for n = 1..39

Example

Some solutions for n=4
..1..0..0..1....0..1..1..1....0..1..1..1....1..1..1..0....0..0..0..0
..0..1..1..1....0..0..0..0....0..0..0..1....1..0..0..1....0..1..1..1
..1..0..1..0....1..1..1..1....1..1..1..0....0..1..1..1....0..0..0..1
..1..1..1..1....0..0..1..0....1..0..0..0....1..0..0..0....0..1..1..1
..1..1..0..0....1..1..0..1....1..0..1..1....0..1..1..1....0..0..0..0
..1..1..1..1....1..0..0..0....0..1..0..0....0..0..0..0....1..1..1..0

Crossrefs

Sequence in context: A232512 A046833 A205754 * A296025 A204362 A321114

Adjacent sequences: A238019 A238020 A238021 * A238023 A238024 A238025

Keyword

nonn

Author

R. H. Hardin, Feb 17 2014

Status

approved