A241254 Number of nX7 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of 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.

24, 41, 356, 3822, 50281, 752717, 13138271, 265444281, 6509404451

Offset

1,1

Comments

Column 7 of A241255

Links

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

Example

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

Crossrefs

Sequence in context: A181702 A304890 A264155 * A376421 A007372 A062910

Adjacent sequences: A241251 A241252 A241253 * A241255 A241256 A241257

Keyword

nonn

Author

R. H. Hardin, Apr 18 2014

Status

approved