A193482 Number of n X n symmetric 0..3 arrays with each element equal to the product mod 4 of two of its horizontal and vertical neighbors

0, 2, 10, 212, 9201, 1236536, 391565294, 316110683652, 658828649763119, 3543427279193946969, 48701064645083867200925

Offset

1,2

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Sequence in context: A320395 A001528 A293148 * A346222 A289948 A282567

Adjacent sequences: A193479 A193480 A193481 * A193483 A193484 A193485

Keyword

nonn

Author

R. H. Hardin Jul 27 2011

Status

approved