A218080 - OEIS

A218080

Number of nX4 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random 0..1 nX4 array

6, 18, 78, 342, 1508, 6606, 29136, 128220, 564548, 2485936, 10945378, 48194280, 212204122, 934356836, 4114075516, 18114710104, 79761011640, 351196268466, 1546354739056, 6808765412512, 29979722654490, 132003926897010

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 4 of A218084

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..85

FORMULA

Empirical: a(n) = 3*a(n-1) +9*a(n-2) -4*a(n-3) -37*a(n-4) -13*a(n-5) +48*a(n-6) +39*a(n-7) -25*a(n-8) -18*a(n-9) -6*a(n-10) -3*a(n-11) -5*a(n-12) +4*a(n-13)

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A318069 A332939 A299412 * A277609 A188119 A239420

Adjacent sequences: A218077 A218078 A218079 * A218081 A218082 A218083

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 20 2012

STATUS

approved