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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
OFFSET
1,2
COMMENTS
Row 4 of A221632
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 21 2013
STATUS
approved