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A248439 Number of length 6+2 0..n arrays with every three consecutive terms having the sum of some two elements equal to twice the third 1
2, 9, 44, 261, 590, 1105, 1684, 2775, 3978, 5365, 6776, 8639, 10512, 12467, 14562, 17349, 20144, 23213, 26282, 29727, 33264, 36831, 40398, 44775, 49264, 53769, 58386, 63261, 68136, 73375, 78614, 84601, 90640, 96693, 102922, 109691, 116460, 123235 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 6 of A248433
LINKS
EXAMPLE
Some solutions for n=6
..4....4....5....5....2....3....4....5....5....3....2....0....1....6....2....1
..6....0....3....3....0....1....2....3....4....4....0....1....3....2....1....3
..2....2....1....1....1....2....6....4....3....2....4....2....5....4....3....2
..4....4....2....5....2....3....4....2....2....3....2....3....1....0....2....1
..6....0....0....3....3....4....2....3....4....4....6....4....3....2....4....3
..5....2....1....1....4....5....6....1....3....2....4....5....5....4....0....5
..4....4....2....5....5....3....4....5....2....3....5....3....4....0....2....4
..6....3....3....3....3....1....5....3....4....4....3....4....3....2....1....3
CROSSREFS
Sequence in context: A047119 A052881 A020071 * A259778 A260081 A259779
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 06 2014
STATUS
approved

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Last modified February 23 09:42 EST 2024. Contains 370276 sequences. (Running on oeis4.)