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A248455 Number of length 7+5 0..n arrays with no three disjoint pairs in any consecutive six terms having the same sum 1
422, 95972, 5407584, 101700684, 1093511486, 7928947808, 43396532796, 191874809608, 719782096174, 2364670301040, 6970470829612, 18772536477828, 46838527917882, 109457792126292, 241702122321108, 507897834185012 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A248448

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..27

EXAMPLE

Some solutions for n=2

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

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

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

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

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

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

..0....0....0....2....0....0....0....0....0....0....0....0....0....2....2....0

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

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

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

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

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

CROSSREFS

Sequence in context: A231745 A249240 A231698 * A238285 A231939 A203099

Adjacent sequences:  A248452 A248453 A248454 * A248456 A248457 A248458

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 06 2014

STATUS

approved

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Last modified January 23 21:55 EST 2021. Contains 340386 sequences. (Running on oeis4.)