

A266168


Isotopism classes of ordered pairs of orthogonal Latin squares.


4




OFFSET

1,5


COMMENTS

The following operations produce things that are counted as equivalent: simultaneous permutation of the rows or columns of both squares; permutation of the symbols within either square.


LINKS

Table of n, a(n) for n=1..9.
J. Egan and I. M. Wanless, Enumeration of MOLS of small order, Mathematics of Computation 85, 2016, 799824.
Ian Wanless, Data on MOLS


CROSSREFS

Cf. A129732, A266166, A266167.
Sequence in context: A007415 A145222 A058833 * A276913 A012775 A157308
Adjacent sequences: A266165 A266166 A266167 * A266169 A266170 A266171


KEYWORD

nonn,more


AUTHOR

Ian Wanless, Dec 22 2015


STATUS

approved



