A247724 Number of length n+3 0..6 arrays with no disjoint pairs in any consecutive four terms having the same sum

1848, 10098, 55372, 303924, 1668072, 9157806, 50284864, 276119316, 1516191100, 8325624724, 45717627824, 251044886360, 1378538951008, 7569846707486, 41567645474272, 228256866284008, 1253407500305364, 6882730399010624

Offset

1,1

Comments

Column 6 of A247726

Links

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

Example

Some solutions for n=3
..3....1....5....3....3....1....2....5....0....3....0....5....5....4....1....2
..2....6....1....1....6....0....3....5....0....2....6....6....1....1....5....2
..3....0....6....4....5....6....0....3....4....2....3....0....0....6....2....5
..1....1....1....4....5....2....3....6....1....6....6....4....3....4....1....1
..6....4....3....6....2....5....5....6....4....1....0....6....6....2....1....1
..2....0....2....1....3....5....0....5....0....6....0....3....0....2....1....4

Crossrefs

Sequence in context: A080395 A092003 A090783 * A236030 A237892 A326318

Adjacent sequences: A247721 A247722 A247723 * A247725 A247726 A247727

Keyword

nonn

Author

R. H. Hardin, Sep 23 2014

Status

approved