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A249237 Number of length 4+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
136, 3888, 60744, 448148, 2325864, 9772492, 34184700, 102003646, 280506352, 694716964, 1591981864, 3441580468, 7017193772, 13588351272, 25335534664, 45379544842, 78550414352, 132184098358, 216354909052, 345309250322 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A249233

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..29

EXAMPLE

Some solutions for n=3

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

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

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

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

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

..3....0....0....0....1....0....1....1....3....3....3....1....1....3....1....1

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

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

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

CROSSREFS

Sequence in context: A251940 A071231 A233102 * A194014 A248452 A035819

Adjacent sequences:  A249234 A249235 A249236 * A249238 A249239 A249240

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 23 2014

STATUS

approved

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Last modified May 9 10:51 EDT 2021. Contains 343732 sequences. (Running on oeis4.)