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A220539 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..1 3Xn array 0
1, 31, 55, 625, 2555, 17935, 90171, 544856, 2962859, 17081286, 94990161, 539185536, 3022799372, 17066737846, 95943415702, 540694505626, 3042529902216, 17135308344664 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 3 of A220537

LINKS

Table of n, a(n) for n=1..18.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A104332 A045116 A092227 * A193362 A293345 A096453

Adjacent sequences:  A220536 A220537 A220538 * A220540 A220541 A220542

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 15 2012

STATUS

approved

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Last modified October 17 08:36 EDT 2019. Contains 328107 sequences. (Running on oeis4.)