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A221635 Equals one maps: number of 4Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..3 4Xn array 1
1, 176, 3575, 64828, 1045365, 16774856, 268423663, 4294961836, 68719443799, 1099511617328, 17592185966917, 281474976692892, 4503599627209009, 72057594037900088, 1152921504606539891, 18446744073709510476 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 4 of A221632

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..20

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A027483 A243647 A220919 * A223411 A068244 A283200

Adjacent sequences:  A221632 A221633 A221634 * A221636 A221637 A221638

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 21 2013

STATUS

approved

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Last modified January 20 01:01 EST 2022. Contains 350467 sequences. (Running on oeis4.)