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A248440
Number of length 7+2 0..n arrays with every three consecutive terms having the sum of some two elements equal to twice the third
1
2, 9, 52, 389, 1014, 2021, 3200, 5589, 8218, 11401, 14696, 18947, 23274, 27861, 32772, 39481, 46246, 53633, 61036, 69369, 77910, 86569, 95228, 105879, 116826, 127859, 139132, 150965, 162798, 175561, 188324, 203137, 218098, 233121, 248604, 265287
OFFSET
1,1
COMMENTS
Row 7 of A248433
LINKS
EXAMPLE
Some solutions for n=6
..4....2....1....3....3....6....5....1....4....5....1....6....3....2....4....2
..0....0....0....2....4....4....3....2....2....1....0....5....4....3....2....6
..2....4....2....4....5....5....1....3....0....3....2....4....5....4....6....4
..4....2....1....3....3....3....5....1....4....2....1....3....3....2....4....5
..0....3....0....2....4....1....3....2....2....4....0....5....4....0....5....3
..2....4....2....1....5....2....4....0....6....3....2....1....2....1....6....4
..1....2....4....3....3....3....5....4....4....2....4....3....3....2....4....2
..3....3....6....5....4....4....3....2....2....1....6....5....4....0....2....0
..5....4....2....4....5....5....4....0....3....3....5....4....5....4....6....1
CROSSREFS
Sequence in context: A369551 A143508 A052882 * A330200 A143922 A305304
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 06 2014
STATUS
approved