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A249240 Number of length 7+5 0..n arrays with no six consecutive terms having two times the sum of any two elements equal to the sum of the remaining four 1
422, 31104, 1365524, 19188990, 171561694, 1195936390, 6483080144, 28086995286, 111475346884, 380335170960, 1167836929374, 3332406055028, 8765941903238, 21457348698458, 50079468971542, 110467990168082, 232510958777794 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A249233

LINKS

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

EXAMPLE

Some solutions for n=2

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

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

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

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

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

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A231585 A231837 A231745 * A231698 A248455 A238285

Adjacent sequences:  A249237 A249238 A249239 * A249241 A249242 A249243

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 23 2014

STATUS

approved

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Last modified June 25 12:30 EDT 2022. Contains 354851 sequences. (Running on oeis4.)