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A221031
Majority value maps: number of n X 4 binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal and antidiagonal neighbors in a random 0..2 n X 4 array.
2
7, 119, 1733, 24485, 345755, 4882030, 68933905, 973340015, 13743460075, 194056216948, 2740053437074, 38689267213364, 546288396106862, 7713534869291859, 108914303513829210, 1537858544870732685
OFFSET
1,1
COMMENTS
Column 4 of A221035.
LINKS
FORMULA
Empirical: a(n) = 22*a(n-1) -139*a(n-2) +446*a(n-3) -825*a(n-4) +817*a(n-5) -168*a(n-6) -528*a(n-7) +480*a(n-8) +48*a(n-9) -208*a(n-10) +64*a(n-11) for n>12.
EXAMPLE
Some solutions for n=3:
..1..1..1..1....0..1..1..0....1..0..0..0....1..1..0..1....0..0..0..1
..0..0..0..1....1..1..1..1....0..0..0..1....1..0..0..1....0..1..1..1
..1..1..1..0....1..0..1..1....1..0..0..0....1..1..0..0....1..1..0..0
CROSSREFS
Cf. A221035.
Sequence in context: A368631 A076283 A057769 * A221323 A268300 A304917
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 29 2012
STATUS
approved