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A218899 Number of 3Xn arrays of the minimum value of corresponding elements and their horizontal, diagonal or antidiagonal neighbors in a random 0..1 3Xn array 1
8, 16, 72, 212, 786, 2594, 9110, 31062, 107510, 369596, 1274760, 4390640, 15132044, 52139518, 179669784, 619118588, 2133406676, 7351495186, 25332356634, 87292564824, 300799972600, 1036523262982, 3571740490936, 12307815695422 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 3 of A218897

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +7*a(n-2) -4*a(n-3) -6*a(n-4) -10*a(n-5) -20*a(n-6) +15*a(n-7) -a(n-8) +22*a(n-9) +14*a(n-10) -5*a(n-11) -6*a(n-13) -2*a(n-14)

EXAMPLE

Some solutions for n=3

..0..0..0....0..0..0....1..0..0....1..0..0....1..0..0....0..0..1....1..0..1

..0..0..0....1..0..1....1..0..0....0..0..0....1..0..0....0..0..1....0..0..1

..0..0..0....0..0..1....0..0..0....0..0..0....0..0..1....0..0..0....1..0..0

CROSSREFS

Sequence in context: A339355 A132794 A082982 * A282785 A278747 A218066

Adjacent sequences:  A218896 A218897 A218898 * A218900 A218901 A218902

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 08 2012

STATUS

approved

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Last modified July 25 13:47 EDT 2021. Contains 346290 sequences. (Running on oeis4.)