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A220580 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..1 2Xn array 1
1, 8, 21, 115, 371, 1504, 5240, 19904, 71787, 266591, 973703, 3590009, 13161398, 48409054, 177699822, 653013280, 2398088376, 8809799868, 32356803616, 118855121770, 436550962678, 1603501078153, 5889674104016, 21633105877502 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 2 of A220579

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

CROSSREFS

Sequence in context: A054855 A220611 A297340 * A100903 A358720 A240648

Adjacent sequences: A220577 A220578 A220579 * A220581 A220582 A220583

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 16 2012

STATUS

approved

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Last modified February 8 15:16 EST 2023. Contains 360149 sequences. (Running on oeis4.)