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 A238317 Number of (n+1)X(2+1) 0..2 arrays with no element greater than all horizontal neighbors or less than all vertical neighbors 1
 9, 67, 376, 1867, 9489, 50232, 267174, 1408341, 7395987, 38886701, 204722786, 1077853232, 5673085286, 29856142160, 157133586571, 827031030519, 4352855509300, 22909846720541, 120578232671314, 634623931681625 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A238323 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 6*a(n-1) -12*a(n-2) +39*a(n-3) +6*a(n-4) +62*a(n-5) +49*a(n-6) +33*a(n-7) -32*a(n-8) -41*a(n-9) -12*a(n-10) +6*a(n-11) +5*a(n-12) +a(n-13) EXAMPLE Some solutions for n=5 ..2..2..1....1..1..1....0..1..1....1..1..1....2..2..2....1..2..2....0..2..2 ..1..1..1....1..1..1....0..0..0....0..0..0....0..0..0....0..0..0....0..2..2 ..1..1..1....2..2..0....0..0..0....0..0..0....0..0..0....0..0..0....2..2..1 ..1..1..0....1..1..0....0..2..2....2..2..0....0..0..0....0..1..1....0..0..0 ..1..1..0....0..1..1....0..2..2....2..2..2....0..1..1....1..2..2....0..0..0 ..1..2..2....0..2..2....0..2..2....2..2..2....1..1..1....2..2..2....2..2..1 CROSSREFS Sequence in context: A332456 A255877 A197277 * A105287 A163349 A016130 Adjacent sequences: A238314 A238315 A238316 * A238318 A238319 A238320 KEYWORD nonn AUTHOR R. H. Hardin, Feb 24 2014 STATUS approved

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Last modified September 17 19:13 EDT 2024. Contains 375990 sequences. (Running on oeis4.)