A241441 Number of 7Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4

24, 9, 1005, 20690, 218885, 4136727, 79901137, 1058201862, 16609740868

Offset

1,1

Comments

Row 7 of A241435

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for n=3
..3..3..2....3..3..2....2..2..3....2..2..3....3..2..3....2..2..3....3..3..2
..2..2..2....2..2..0....2..1..3....2..1..3....2..1..3....2..1..3....2..2..2
..3..1..3....3..3..2....3..1..2....3..1..0....3..1..2....3..3..2....3..1..2
..2..1..2....2..0..2....2..2..2....3..2..0....2..0..0....2..1..2....3..1..2
..2..1..3....2..0..2....3..1..2....2..2..2....2..0..0....3..1..2....2..2..2
..3..3..0....2..0..0....2..2..2....2..0..2....3..3..0....3..2..0....3..1..2
..2..2..0....2..0..0....2..1..2....2..0..0....2..2..0....2..0..2....3..2..0

Crossrefs

Sequence in context: A040557 A040556 A070663 * A343389 A267024 A259337

Adjacent sequences: A241438 A241439 A241440 * A241442 A241443 A241444

Keyword

nonn

Author

R. H. Hardin, Apr 22 2014

Status

approved