A253128 Number of length n+2 0..7 arrays with the sum of medians of adjacent triples multiplied by some arrangement of +-1 equal to zero

22, 1968, 4083, 98124, 570578, 7036012, 54817908, 503679532, 4023378619, 33615995160, 268926369666, 2182138427066, 17455223471532, 140332925179614

Offset

1,1

Comments

Column 7 of A253129

Links

Table of n, a(n) for n=1..14.

Example

Some solutions for n=4
..3....0....4....0....6....0....5....5....5....6....4....1....7....3....5....6
..7....5....1....7....0....7....7....0....1....2....4....1....3....0....6....2
..6....7....0....3....3....6....6....7....1....6....4....0....1....2....7....2
..5....4....1....3....7....6....3....5....0....3....0....3....7....5....6....2
..5....1....1....6....6....2....6....2....0....7....2....5....5....4....2....3
..2....6....4....2....0....6....7....7....2....2....5....7....1....1....7....0

Crossrefs

Sequence in context: A196948 A202885 A183488 * A046445 A133235 A114449

Adjacent sequences: A253125 A253126 A253127 * A253129 A253130 A253131

Keyword

nonn

Author

R. H. Hardin, Dec 27 2014

Status

approved