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A220918 Equals one maps: number of 3Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..2 3Xn array 1
1, 38, 379, 3687, 30963, 253013, 2042071, 16390010, 131304057, 1051088784, 8410953281, 67295527293, 538391560268, 4307227357177, 34458145224515, 275666265873864, 2205333684261561, 17642679462717579, 141141451046332037 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 3 of A220916

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..33

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A240263 A156661 A249711 * A187078 A155193 A159943

Adjacent sequences:  A220915 A220916 A220917 * A220919 A220920 A220921

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 24 2012

STATUS

approved

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Last modified May 18 03:15 EDT 2022. Contains 353779 sequences. (Running on oeis4.)