A249218 Number of length 6+6 0..n arrays with no seven consecutive terms having five times the sum of any two elements equal to two times the sum of the remaining five.

3872, 208876, 8486156, 107662502, 950035900, 6008974124, 30726981418, 127770780052, 464154488364, 1470845250424, 4278893132168, 11316587289834, 28139818768978, 65491995146282, 145432249623888

Offset

1,1

Comments

Row 6 of A249212

Links

Table of n, a(n) for n=1..15.

Example

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

Crossrefs

Sequence in context: A035898 A249203 A249325 * A264206 A035781 A108005

Adjacent sequences: A249215 A249216 A249217 * A249219 A249220 A249221

Keyword

nonn

Author

R. H. Hardin, Oct 23 2014

Status

approved