A247408 Number of length 4+4 0..n arrays with no disjoint pairs in any consecutive five terms having the same sum.

0, 40, 428, 6752, 47592, 225488, 826488, 2696652, 7451396, 19200532, 44634008, 96779936, 196510032, 380589596, 700636600, 1243173684, 2124664616, 3523145424, 5673664032, 8921020564, 13691990956, 20604281544, 30407094956, 44122851304

Offset

1,2

Comments

Row 4 of A247404.

Links

R. H. Hardin, Table of n, a(n) for n = 1..69

Example

Some solutions for n=5
..3....1....1....1....1....5....4....5....4....0....2....1....5....0....4....0
..1....3....0....0....0....4....1....5....0....1....0....2....0....5....4....1
..2....1....5....5....3....1....3....5....2....1....5....4....4....0....4....4
..5....2....5....2....1....4....1....3....0....3....5....4....5....4....2....4
..5....1....3....0....1....4....5....1....1....1....5....0....3....3....0....2
..0....1....5....4....1....3....2....0....0....5....2....3....5....5....3....0
..4....5....1....4....4....4....1....1....0....1....1....2....1....3....4....4
..5....3....2....4....3....0....3....5....2....0....3....4....5....0....0....5

Crossrefs

Sequence in context: A251129 A007772 A228122 * A285855 A210355 A210348

Adjacent sequences: A247405 A247406 A247407 * A247409 A247410 A247411

Keyword

nonn

Author

R. H. Hardin, Sep 16 2014

Status

approved