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A247411 Number of length 7+4 0..n arrays with no disjoint pairs in any consecutive five terms having the same sum 1
0, 40, 864, 69976, 1044356, 9228900, 56865236, 311386556, 1306471352, 5072526324, 16781511756, 50442813960, 137671413776, 352319727008, 836231888980, 1886773303796, 4029623018176, 8248006141736, 16180831379824, 30699935052184 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 7 of A247404

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..59

EXAMPLE

Some solutions for n=4

..3....4....3....0....0....4....4....0....4....1....3....1....2....0....4....3

..0....0....0....0....1....4....4....4....2....4....0....4....0....0....0....4

..2....0....4....2....4....2....0....3....0....4....2....4....4....0....0....4

..0....0....0....3....2....4....1....2....3....4....4....4....4....2....3....1

..0....3....0....0....4....3....2....0....0....2....0....0....4....4....2....4

..3....2....1....0....4....4....4....4....4....1....1....1....3....0....0....2

..4....0....0....4....0....4....0....4....0....0....0....2....2....0....4....4

..0....0....2....2....4....2....0....3....0....0....0....0....4....3....0....0

..2....0....4....3....1....4....1....4....2....4....3....0....4....0....0....4

..4....4....0....4....2....0....2....1....1....0....0....0....0....2....2....4

..4....2....3....4....4....3....4....4....4....1....4....3....1....0....1....2

CROSSREFS

Sequence in context: A010992 A250584 A004421 * A250986 A190825 A054340

Adjacent sequences:  A247408 A247409 A247410 * A247412 A247413 A247414

KEYWORD

nonn

AUTHOR

R. H. Hardin, Sep 16 2014

STATUS

approved

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Last modified September 15 02:19 EDT 2019. Contains 327062 sequences. (Running on oeis4.)