A193484 Number of n X n symmetric 0..5 arrays with each element equal to the product mod 6 of two of its horizontal and vertical neighbors

0, 4, 24, 989, 93061, 31790896, 29561132743, 83415272837037, 713619852188928603

Offset

1,2

Links

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

Example

Some solutions for 4X4
..1..5..2..2....1..1..1..3....4..4..4..4....0..0..1..1....4..2..2..0
..5..5..1..1....1..1..1..3....4..4..2..4....0..1..1..1....2..2..4..0
..2..1..1..1....1..1..1..4....4..2..2..4....1..1..3..3....2..4..4..4
..2..1..1..1....3..3..4..4....4..4..4..4....1..1..3..3....0..0..4..4

Crossrefs

Sequence in context: A223005 A009043 A024251 * A024252 A368141 A368144

Adjacent sequences: A193481 A193482 A193483 * A193485 A193486 A193487

Keyword

nonn

Author

R. H. Hardin Jul 27 2011

Status

approved