A252183 Number of length 7+2 0..n arrays with the sum of the maximum minus the minimum of adjacent triples multiplied by some arrangement of +-1 equal to zero

240, 9295, 123826, 907249, 4652710, 18231947, 59838132, 169267931, 429064420, 989821179, 2121738374, 4261220223, 8118682922, 14752915881, 25768412560, 43419516045, 70948741604

Offset

1,1

Comments

Row 7 of A252177

Links

Table of n, a(n) for n=1..17.

Example

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

Crossrefs

Sequence in context: A264317 A270174 A008340 * A251434 A187167 A282227

Adjacent sequences: A252180 A252181 A252182 * A252184 A252185 A252186

Keyword

nonn

Author

R. H. Hardin, Dec 15 2014

Status

approved