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A247725 Number of length n+3 0..7 arrays with no disjoint pairs in any consecutive four terms having the same sum 1
3248, 20816, 133780, 860360, 5532212, 35577396, 228817500, 1471661464, 9465023576, 60874728614, 391519927124, 2518086482802, 16195230721252, 104160655154148, 669915976764744, 4308607742197298, 27711087156320840 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A247726

LINKS

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

EXAMPLE

Some solutions for n=3

..7....7....7....6....6....4....0....6....2....5....5....2....7....2....0....2

..6....0....6....3....4....3....3....7....3....6....4....4....2....1....6....1

..3....7....7....0....7....7....6....1....6....0....1....7....3....4....7....2

..7....2....4....0....2....4....6....1....6....3....1....2....4....6....0....6

..5....1....4....6....1....2....2....0....0....7....3....0....6....6....7....2

..2....2....5....4....5....6....6....6....7....7....0....3....2....2....2....5

CROSSREFS

Sequence in context: A118212 A233750 A252014 * A265198 A269061 A253332

Adjacent sequences:  A247722 A247723 A247724 * A247726 A247727 A247728

KEYWORD

nonn

AUTHOR

R. H. Hardin, Sep 23 2014

STATUS

approved

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Last modified January 22 18:31 EST 2022. Contains 350488 sequences. (Running on oeis4.)