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 A247404 T(n,k)=Number of length n+4 0..k arrays with no disjoint pairs in any consecutive five terms having the same sum 13
 0, 40, 0, 200, 40, 0, 760, 264, 40, 0, 2280, 1544, 340, 40, 0, 5640, 6216, 3200, 428, 40, 0, 12120, 19080, 17164, 6752, 528, 40, 0, 23800, 49032, 65500, 47592, 14456, 640, 40, 0, 43040, 113896, 201172, 225488, 132368, 31240, 864, 40, 0, 73840, 237456, 553328 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Table starts .0.40..200....760.....2280......5640......12120.......23800........43040 .0.40..264...1544.....6216.....19080......49032......113896.......237456 .0.40..340...3200....17164.....65500.....201172......553328......1328468 .0.40..428...6752....47592....225488.....826488.....2696652......7451396 .0.40..528..14456...132368....775668....3385192....13124760.....41711352 .0.40..640..31240...369064...2663568...13824356....63763868....232965764 .0.40..864..69976..1044356...9228900...56865236...311386556...1306471352 .0.40.1136.158392..2970580..32131008..234794368..1525127696...7342334396 .0.40.1456.359320..8447400.111936140..969917240..7475411480..41279228204 .0.40.1824.812952.23975404.389317160.4001182804.36618403600.231935339636 LINKS R. H. Hardin, Table of n, a(n) for n = 1..1835 FORMULA Empirical for column k: k=1: a(n) = 0 k=2: a(n) = a(n-1) k=3: a(n) = 6*a(n-5) -8*a(n-10) k=4: [order 68] Empirical for row n: n=1: [linear recurrence of order 12; also polynomial of degree 5 plus quasipolynomial of degree 1 with period 12] n=2: [linear recurrence of order 30] EXAMPLE Some solutions for n=5 k=4 ..2....2....0....1....0....2....2....0....2....3....1....4....0....0....3....4 ..1....3....4....4....2....4....1....3....4....0....3....0....3....3....2....0 ..4....0....4....0....4....0....0....2....1....0....3....3....0....2....0....3 ..2....4....2....2....0....4....4....4....0....0....3....2....4....0....0....2 ..2....0....1....0....3....3....0....4....0....1....0....0....0....4....4....0 ..2....2....0....1....0....4....2....4....2....2....2....0....0....0....1....0 ..3....0....0....0....2....4....0....1....0....4....3....4....2....0....2....4 ..4....0....0....4....0....2....1....2....4....0....3....3....3....2....0....3 ..2....3....4....0....4....4....4....0....1....0....3....2....4....3....4....0 CROSSREFS Sequence in context: A067159 A292152 A331907 * A013373 A013375 A013419 Adjacent sequences: A247401 A247402 A247403 * A247405 A247406 A247407 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Sep 16 2014 STATUS approved

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Last modified December 7 18:28 EST 2023. Contains 367660 sequences. (Running on oeis4.)