A248455 Number of length 7+5 0..n arrays with no three disjoint pairs in any consecutive six terms having the same sum

422, 95972, 5407584, 101700684, 1093511486, 7928947808, 43396532796, 191874809608, 719782096174, 2364670301040, 6970470829612, 18772536477828, 46838527917882, 109457792126292, 241702122321108, 507897834185012

Offset

1,1

Comments

Row 7 of A248448

Links

R. H. Hardin, Table of n, a(n) for n = 1..27

Example

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

Crossrefs

Sequence in context: A231745 A249240 A231698 * A238285 A231939 A203099

Adjacent sequences: A248452 A248453 A248454 * A248456 A248457 A248458

Keyword

nonn

Author

R. H. Hardin, Oct 06 2014

Status

approved