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A248468
Number of length 7+2 0..n arrays with no three consecutive terms having the sum of any two elements equal to twice the third
1
110, 1152, 43940, 387488, 2582406, 11447368, 44452660, 139623544, 400150926, 1002628764, 2352502608, 5078891508, 10430306882, 20141675148, 37480145240, 66683720948, 115148012058, 192026426768, 312626222120, 495163608752
OFFSET
1,1
COMMENTS
Row 7 of A248461
LINKS
EXAMPLE
Some solutions for n=3
..0....2....2....1....3....1....0....0....2....1....0....3....2....1....1....3
..0....2....3....3....1....0....0....3....3....3....3....1....2....3....0....1
..1....3....3....3....0....3....3....3....0....3....1....1....0....0....1....0
..1....0....0....0....0....2....1....1....2....2....3....3....2....3....1....3
..3....2....0....1....3....0....0....3....3....2....3....1....0....3....3....2
..0....3....3....1....2....2....0....1....0....1....2....3....3....0....0....3
..1....3....0....0....0....0....2....0....0....2....2....1....3....1....3....0
..0....2....1....3....3....2....0....0....2....1....0....3....2....1....0....1
..0....3....1....3....0....0....3....3....0....2....3....3....2....3....0....1
CROSSREFS
Sequence in context: A213087 A284244 A232781 * A231967 A232339 A358256
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 06 2014
STATUS
approved