A249214 Number of length 2+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

250, 4586, 51200, 294568, 1267754, 4353482, 12777540, 32910110, 77097762, 165865332, 335432460, 639208042, 1165096450, 2034488164, 3435664024, 5608125804, 8919812138, 13812228622, 20946412056, 31084523896, 45360185886

Offset

1,1

Comments

Row 2 of A249212

Links

R. H. Hardin, Table of n, a(n) for n = 1..26

Example

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

Crossrefs

Sequence in context: A234497 A234491 A249199 * A249321 A109121 A253005

Adjacent sequences: A249211 A249212 A249213 * A249215 A249216 A249217

Keyword

nonn

Author

R. H. Hardin, Oct 23 2014

Status

approved