A222389 Sum of neighbor maps: number of 4Xn binary arrays indicating the locations of corresponding elements equal to the sum mod 3 of their horizontal and antidiagonal neighbors in a random 0..2 4Xn array

16, 232, 3968, 63488, 1048576, 16776896, 268369920, 4294961152, 68702608704, 1099511627776, 17592160878592, 281474976700416, 4503599627370496

Offset

1,1

Comments

Row 4 of A222386

Links

Table of n, a(n) for n=1..13.

Example

Some solutions for n=3
..0..1..0....1..0..1....1..1..1....1..1..0....1..0..1....1..0..0....0..1..0
..0..1..0....0..0..0....1..0..1....1..0..1....1..0..0....0..1..1....0..0..1
..0..0..0....1..1..0....0..1..0....1..0..1....0..0..1....0..1..0....1..1..0
..0..0..0....0..1..1....1..0..1....1..1..1....1..1..0....1..0..1....1..1..1

Crossrefs

Sequence in context: A274467 A119463 A292341 * A222938 A265469 A111096

Adjacent sequences: A222386 A222387 A222388 * A222390 A222391 A222392

Keyword

nonn

Author

R. H. Hardin Feb 18 2013

Status

approved