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A248459 Number of length n+2 0..6 arrays with no three consecutive terms having the sum of any two elements equal to twice the third 1
282, 1652, 9684, 56782, 332940, 1952254, 11447368, 67123652, 393591402, 2307892826, 13532738130, 79351606012, 465292191408, 2728323147524, 15998005845580, 93807139848202, 550054773800480, 3225343557770222 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 6 of A248461
LINKS
FORMULA
Empirical: a(n) = 5*a(n-1) +4*a(n-2) +20*a(n-3) -58*a(n-4) -109*a(n-5) -155*a(n-6) +28*a(n-7) +295*a(n-8) +175*a(n-9) +153*a(n-10) +36*a(n-11) +382*a(n-12) +183*a(n-13) -193*a(n-14) +140*a(n-15) +96*a(n-16)
EXAMPLE
Some solutions for n=4
..0....0....3....4....0....5....1....5....1....2....0....6....2....0....4....6
..4....6....4....0....5....2....5....1....0....1....0....4....0....0....3....3
..3....0....3....1....4....0....4....0....5....5....3....3....6....6....3....2
..0....5....6....4....2....5....5....6....4....1....2....1....6....6....2....2
..5....6....5....1....2....6....2....5....4....1....6....0....4....1....3....1
..4....5....5....5....3....5....1....0....2....4....0....4....4....5....0....4
CROSSREFS
Sequence in context: A252364 A345704 A224115 * A172627 A172725 A172804
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 06 2014
STATUS
approved

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Last modified July 14 02:38 EDT 2024. Contains 374291 sequences. (Running on oeis4.)