A166490 Number of SOLSSOMs of order n.

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

Offset: 4

Author

Martin P Kidd, Oct 21 2009

Keywords

• hard
• more
• nonn

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)

Crossrefs

Cf. A166487, A166488, A166489.

Extensions

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