

A129732


Number of main classes of GraecoLatin squares of order n. That is, species of pairs of orthogonal Latin squares.


5




OFFSET

3,5


LINKS



EXAMPLE

The unique example for n=3 has two Latin squares [[0, 2, 1], [2, 1, 0], [1, 0, 2]] and [[0, 2, 1], [1, 0, 2], [2, 1, 0]].


CROSSREFS



KEYWORD

hard,more,nice,nonn


AUTHOR



EXTENSIONS



STATUS

approved



