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A238074 Number of (n+1)X(1+1) 0..3 arrays with the maximum plus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
256, 1592, 9884, 59772, 378708, 2285576, 14349272, 86693008, 546582828, 3300593268, 20768825876, 125443787248, 790067077480, 4771492579096, 30039037764956, 181425384418428, 1142390702895284, 6899484032213320 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A238081

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 17*a(n-2) +736*a(n-4) +2353*a(n-6) +2483*a(n-8) +800*a(n-10) for n>11

EXAMPLE

Some solutions for n=4

..2..2....0..2....1..1....0..0....3..2....0..1....1..0....1..1....2..2....1..3

..2..0....2..3....2..0....1..2....1..1....3..1....2..1....1..3....2..0....3..1

..3..1....1..1....3..1....1..1....1..2....1..2....1..1....2..0....3..1....0..2

..3..3....2..1....3..3....2..0....1..0....2..2....1..1....1..1....3..2....0..0

..2..0....3..1....3..2....3..3....0..1....0..1....2..1....1..0....3..0....3..3

CROSSREFS

Sequence in context: A237921 A237915 A238081 * A251974 A250429 A238155

Adjacent sequences:  A238071 A238072 A238073 * A238075 A238076 A238077

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 17 2014

STATUS

approved

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Last modified February 27 05:58 EST 2020. Contains 332299 sequences. (Running on oeis4.)