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 A248458 Number of length n+2 0..5 arrays with no three consecutive terms having the sum of any two elements equal to twice the third 1
 174, 862, 4272, 21182, 105026, 520788, 2582406, 12805334, 63497776, 314866606, 1561330890, 7742183252, 38391228334, 190370917646, 943993962960, 4680991358518, 23211674211122, 115099939580084, 570747116572614 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 5 of A248461 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 3*a(n-1) +10*a(n-2) +11*a(n-3) -32*a(n-4) -119*a(n-5) -139*a(n-6) -26*a(n-7) +126*a(n-8) +130*a(n-9) +28*a(n-10) -12*a(n-11) -4*a(n-12) EXAMPLE Some solutions for n=5 ..0....0....0....0....4....4....4....2....3....3....4....0....3....4....1....4 ..2....4....1....0....4....0....2....4....2....0....1....3....1....1....0....4 ..0....5....0....4....3....5....5....2....0....2....5....4....4....1....3....0 ..2....4....3....0....4....0....1....2....5....0....5....4....5....4....5....4 ..2....1....0....0....4....5....5....3....1....3....0....0....2....1....5....3 ..4....1....1....4....5....1....0....2....2....0....0....3....2....3....0....4 ..4....2....3....3....4....4....3....5....2....4....3....4....3....3....3....4 CROSSREFS Sequence in context: A077395 A185534 A185526 * A053173 A185525 A224433 Adjacent sequences: A248455 A248456 A248457 * A248459 A248460 A248461 KEYWORD nonn AUTHOR R. H. Hardin, Oct 06 2014 STATUS approved

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Last modified April 21 23:44 EDT 2024. Contains 371886 sequences. (Running on oeis4.)