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A221063 Equals one maps: number of 2Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..3 2Xn array 2
1, 8, 37, 172, 771, 3392, 14569, 61210, 252491, 1028162, 4152903, 16695976, 66953537, 268144582, 1073206163, 4293994258, 17178121515, 68716367280, 274872418553, 1099502006098, 4398029741851, 17592156966114, 70368693978927 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 2 of A221062

LINKS

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

FORMULA

Empirical: a(n) = 7*a(n-1) -12*a(n-2) -6*a(n-3) +26*a(n-4) -4*a(n-5) -17*a(n-6) +3*a(n-7) +4*a(n-8) for n>12

EXAMPLE

Some solutions for n=3

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

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

CROSSREFS

Sequence in context: A272739 A220917 A221891 * A221633 A201452 A128246

Adjacent sequences:  A221060 A221061 A221062 * A221064 A221065 A221066

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 31 2012

STATUS

approved

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Last modified June 29 23:00 EDT 2022. Contains 354913 sequences. (Running on oeis4.)