A248442 Number of length n+5 0..2 arrays with no three disjoint pairs in any consecutive six terms having the same sum.

546, 1272, 3000, 7116, 16932, 40326, 95972, 228582, 544916, 1299898, 3102280, 7405160, 17675428, 42190170, 100710662, 240417500, 573955058, 1370249798, 3271301050, 7809809928, 18644959970, 44512788348, 106269958996, 253709963910

Offset

1,1

Comments

Column 2 of A248448

Links

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

Example

Some solutions for n=6
..2....0....0....1....0....2....1....2....0....1....2....1....0....0....2....2
..1....2....1....0....0....0....0....2....0....1....0....0....0....2....0....0
..1....2....2....2....1....2....1....1....0....1....0....2....0....1....0....0
..1....0....0....0....2....2....2....2....0....0....0....0....0....0....2....0
..1....2....0....0....1....1....1....2....2....2....0....2....2....0....0....0
..1....2....0....0....0....2....0....2....0....0....1....2....1....0....0....1
..0....0....0....2....0....2....1....1....0....0....0....1....0....1....0....0
..0....2....1....1....0....2....2....0....0....1....0....1....0....2....1....1
..2....2....0....1....0....0....2....1....0....0....1....1....0....1....1....0
..1....0....1....1....1....2....2....1....1....2....2....0....1....0....2....0
..0....2....0....0....0....1....1....0....0....1....0....0....0....1....0....2

Crossrefs

Sequence in context: A053327 A252537 A099008 * A043479 A002606 A047637

Adjacent sequences: A248439 A248440 A248441 * A248443 A248444 A248445

Keyword

nonn

Author

R. H. Hardin, Oct 06 2014

Status

approved