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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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 7 of A248433 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 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: A006152 A143508 A052882 * A330200 A143922 A305304 Adjacent sequences: A248437 A248438 A248439 * A248441 A248442 A248443 KEYWORD nonn AUTHOR R. H. Hardin, Oct 06 2014 STATUS approved

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Last modified November 28 17:03 EST 2023. Contains 367419 sequences. (Running on oeis4.)