A253135 Number of length 7+2 0..n arrays with the sum of medians of adjacent triples multiplied by some arrangement of +-1 equal to zero

256, 9205, 119317, 866944, 4373134, 16987236, 54817908, 153203700, 382427902, 870816931, 1838833115, 3646368028, 6856114327, 12312181791, 21251285131, 35433012016, 57295925135, 90169126459, 138505569304, 208154690963

Offset

1,1

Comments

Row 7 of A253129

Links

R. H. Hardin, Table of n, a(n) for n = 1..22

Example

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

Crossrefs

Sequence in context: A236214 A232959 A187955 * A128991 A230973 A191680

Adjacent sequences: A253132 A253133 A253134 * A253136 A253137 A253138

Keyword

nonn

Author

R. H. Hardin, Dec 27 2014

Status

approved