A237876 Number of (1+2)X(n+2) 0..3 arrays with the (lower) medians of each row unequal to its neighbors and each column equal to its neighbors

8688, 160116, 2555616, 51445400, 812946240, 17003002820, 268858480800, 5729218802184, 91097806323648, 1961386312726824, 31409027107915584, 680566352758997424, 10976337867131545728, 238840537990803754692

Offset

1,1

Comments

Row 1 of A237875

Links

R. H. Hardin, Table of n, a(n) for n = 1..21

Example

Some solutions for n=1
..2..2..3....0..2..2....1..0..0....2..2..1....2..3..3....2..0..2....3..2..0
..3..0..1....3..3..2....3..3..1....0..1..0....0..2..2....0..2..0....0..1..2
..0..3..2....2..2..3....0..1..3....1..1..2....3..1..0....2..2..2....2..3..2

Crossrefs

Sequence in context: A242140 A235171 A237875 * A237874 A252646 A170796

Adjacent sequences: A237873 A237874 A237875 * A237877 A237878 A237879

Keyword

nonn

Author

R. H. Hardin, Feb 14 2014

Status

approved