A239039 Number of n X n 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, modulo 4

3, 41, 2739, 996325, 1916936295, 19230047618078, 1009453455314170147, 277622934845789537083432, 399900776405405212831407783271

Offset

1,1

Comments

Diagonal of A239047

Links

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

Example

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

Crossrefs

Sequence in context: A262644 A238990 A192888 * A228456 A238717 A057013

Adjacent sequences: A239036 A239037 A239038 * A239040 A239041 A239042

Keyword

nonn

Author

R. H. Hardin, Mar 09 2014

Status

approved