A166490 Number of SOLSSOMs of order n.

1152, 172800, 0, 12192768000, 608662978560000, 464573723443200000, 0

Offset

4,1

Comments

A SOLSSOM is a self-orthogonal Latin square with a symmetric orthogonal mate.

References

A.P. Burger, M.P. Kidd and J.H. van Vuuren, Enumeration of self-orthogonal Latin squares with symmetric orthogonal mates, Submitted to LitNet Akademies (Natuurwetenskappe)

Links

Table of n, a(n) for n=4..10.

Crossrefs

Cf. A166487, A166488, A166489.

Sequence in context: A339926 A170775 A350691 * A035761 A107557 A364180

Adjacent sequences: A166487 A166488 A166489 * A166491 A166492 A166493

Keyword

hard,more,nonn

Author

Martin P Kidd, Oct 21 2009

Extensions

Number for n=8 corrected by Martin P Kidd, Nov 01 2010

Status

approved