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 A247921 Number of length n+4 0..2 arrays with some disjoint pairs in every consecutive five terms having the same sum 1
 203, 529, 1387, 3649, 9611, 25265, 66443, 174817, 460139, 1211409, 3189259, 8396641, 22107499, 58209297, 153270315, 403580257, 1062688075, 2798238641, 7368281835, 19402138145, 51089798827, 134530145105, 354246523595 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A247927 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 3*a(n-1) -2*a(n-3) -a(n-4) +6*a(n-5) -14*a(n-6) -13*a(n-7) -2*a(n-8) +8*a(n-9) -4*a(n-10) +8*a(n-11) +8*a(n-12) EXAMPLE Some solutions for n=6 ..0....0....1....2....1....1....0....2....2....0....0....1....1....1....2....2 ..1....2....2....0....2....1....1....1....1....2....2....1....0....0....1....1 ..1....2....2....1....1....1....1....0....2....0....1....2....1....1....0....1 ..0....1....1....1....2....1....1....1....1....1....0....2....0....0....0....1 ..2....0....0....0....0....2....1....2....1....1....1....0....2....0....1....0 ..1....1....1....1....0....1....0....1....1....0....0....0....2....0....1....0 ..0....0....2....2....1....2....1....1....1....0....1....2....1....0....1....0 ..1....2....1....0....1....2....1....1....0....0....1....1....0....0....1....0 ..0....2....2....1....1....1....1....1....2....0....1....1....1....1....0....0 ..2....1....2....1....2....1....2....1....2....0....1....2....1....1....2....2 CROSSREFS Sequence in context: A259330 A090486 A228320 * A240903 A250751 A211565 Adjacent sequences:  A247918 A247919 A247920 * A247922 A247923 A247924 KEYWORD nonn AUTHOR R. H. Hardin, Sep 26 2014 STATUS approved

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Last modified January 20 20:50 EST 2021. Contains 340332 sequences. (Running on oeis4.)