A247733 Number of length 7+3 0..n arrays with no disjoint pairs in any consecutive four terms having the same sum

8, 2584, 71060, 1032952, 8465936, 50284864, 228817500, 865051288, 2803353724, 8076111272, 21047881136, 50595638620, 113391448136, 239642226524, 480927920532, 923214323088, 1703288171740, 3035113016796, 5241168202156

Offset

1,1

Comments

Row 7 of A247726

Links

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

Example

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

Crossrefs

Sequence in context: A173175 A268150 A325062 * A343696 A210126 A259440

Adjacent sequences: A247730 A247731 A247732 * A247734 A247735 A247736

Keyword

nonn

Author

R. H. Hardin, Sep 23 2014

Status

approved