A249219 Number of length 7+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

7680, 541624, 30475714, 470797744, 4971575032, 36636435714, 215266489016, 1008960229492, 4090166833220, 14277941121138, 45489560699456, 130575639288782, 350906881230300, 877498861912448, 2086682953389618

Offset

1,1

Comments

Row 7 of A249212

Links

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

Example

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

Crossrefs

Sequence in context: A229508 A249204 A249326 * A076339 A105132 A162141

Adjacent sequences: A249216 A249217 A249218 * A249220 A249221 A249222

Keyword

nonn

Author

R. H. Hardin, Oct 23 2014

Status

approved