A248443 Number of length n+5 0..3 arrays with no three disjoint pairs in any consecutive six terms having the same sum.

3372, 11436, 39072, 133872, 459276, 1576148, 5407584, 18555016, 63680912, 218584848, 750346316, 2575822244, 8842376738, 30354462070, 104202513840, 357714016466, 1227990754114, 4215556651472, 14471543850286, 49679225175954

Offset

1,1

Comments

Column 3 of A248448.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..3....2....2....2....3....3....1....3....2....1....1....2....3....2....2....3
..0....3....0....1....2....2....0....2....0....0....0....3....0....0....2....0
..2....2....1....0....1....0....2....2....3....3....0....0....1....1....0....2
..3....0....2....2....0....1....3....0....0....2....3....3....1....3....2....3
..1....1....0....2....0....0....2....1....1....0....0....3....3....0....2....3
..1....3....0....0....2....1....3....0....1....1....2....2....0....1....3....1
..1....3....2....2....3....0....2....2....3....0....1....2....1....2....2....2
..1....1....0....3....0....2....1....2....2....1....1....0....2....0....1....0
..1....2....0....3....1....0....2....2....3....3....1....0....1....2....1....1

Crossrefs

Cf. A248448.

Sequence in context: A139778 A346025 A178506 * A254391 A254384 A253979

Adjacent sequences: A248440 A248441 A248442 * A248444 A248445 A248446

Keyword

nonn

Author

R. H. Hardin, Oct 06 2014

Status

approved