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 A246897 Number of length 5+4 0..n arrays with some pair in every consecutive five terms totalling exactly n 1
 416, 16621, 173056, 1216081, 4971120, 17677453, 47799488, 120392449, 259777600, 536775181, 1005318336, 1828277521, 3107102096, 5168689261, 8183025280, 12745702273, 19117702368, 28308317869, 40691100800, 57882676561, 80386887856 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 5 of A246892 LINKS R. H. Hardin, Table of n, a(n) for n = 1..65 FORMULA Empirical: a(n) = 2*a(n-1) +5*a(n-2) -12*a(n-3) -9*a(n-4) +30*a(n-5) +5*a(n-6) -40*a(n-7) +5*a(n-8) +30*a(n-9) -9*a(n-10) -12*a(n-11) +5*a(n-12) +2*a(n-13) -a(n-14) EXAMPLE Some solutions for n=3 ..3....2....0....3....2....0....0....1....2....0....0....0....0....0....2....0 ..2....2....0....2....1....3....3....0....0....3....0....0....2....1....3....3 ..2....2....1....0....2....2....1....2....0....2....0....3....1....2....0....0 ..2....1....2....0....1....1....0....0....1....2....2....0....2....2....1....1 ..1....0....3....3....0....0....1....1....1....0....3....3....0....2....1....2 ..0....1....2....2....1....0....2....2....3....1....3....3....0....3....3....1 ..2....3....3....3....3....3....1....2....2....1....0....1....0....1....0....2 ..2....0....0....1....1....1....1....1....0....3....3....0....3....3....0....0 ..1....0....1....1....0....0....0....3....3....1....1....0....3....0....2....2 CROSSREFS Sequence in context: A224602 A249006 A249471 * A223422 A239191 A324613 Adjacent sequences: A246894 A246895 A246896 * A246898 A246899 A246900 KEYWORD nonn AUTHOR R. H. Hardin, Sep 06 2014 STATUS approved

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Last modified June 15 16:36 EDT 2024. Contains 373410 sequences. (Running on oeis4.)