A247400 Number of length n+4 0..4 arrays with no disjoint pairs in any consecutive five terms having the same sum

760, 1544, 3200, 6752, 14456, 31240, 69976, 158392, 359320, 812952, 1829160, 4143352, 9440664, 21556600, 49120856, 111398648, 252748504, 575187704, 1311886744, 2991128696, 6801264184, 15449413384, 35134365976, 80031107576

Offset

1,1

Comments

Column 4 of A247404

Links

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

R. H. Hardin, Empirical recurrence of order 68

Formula

Empirical recurrence of order 68 (see link above)

Example

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

Crossrefs

Sequence in context: A157983 A014747 A258135 * A234892 A233879 A165629

Adjacent sequences: A247397 A247398 A247399 * A247401 A247402 A247403

Keyword

nonn

Author

R. H. Hardin, Sep 16 2014

Status

approved