A241261 Number of 7 X n 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.

20, 488, 2111, 13328, 225191, 1558957, 13138271, 205823368, 1596727720, 16865140873

Offset

1,1

Comments

Row 7 of A241255.

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Cf. A241255.

Sequence in context: A159753 A252975 A000827 * A118552 A270578 A255492

Adjacent sequences: A241258 A241259 A241260 * A241262 A241263 A241264

Keyword

nonn

Author

R. H. Hardin, Apr 18 2014

Status

approved