A092329 - OEIS

A092329

Number of nonisomorphic, constructed lattice-square designs of order n as n runs through the odd prime-powers (3, 5, 7, 9, 11, 13, ...).

1, 2, 4, 9, 31, 128

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OFFSET

3,2

COMMENTS

Equivalence classes of designs are challenging. Here the difficulty is reduced by focusing on constructed designs.

REFERENCES

W. Y.-C. Chen and D. C. Torney, Equivalence Classes of Matchings and Lattice-Square Designs, Discrete Applied Math, in press.

LINKS

Table of n, a(n) for n=3..8.

William Y.-C. Chen and David C. Torney, Equivalence Classes of Matchings and Lattice-Square Designs, Discr. Appl. Math. vol. 145 no. 3 (2005) pp 349-357.

CROSSREFS

Sequence in context: A306505 A243789 A214935 * A053548 A054119 A259490

Adjacent sequences: A092326 A092327 A092328 * A092330 A092331 A092332

KEYWORD

nonn,uned,obsc

AUTHOR

David C. Torney (dtorney(AT)earthlink.com), Mar 17 2004

EXTENSIONS

What does "constructed" mean? If, as I suspect, it means constructed as of Mar 17 2004, then this is a time-dependent sequence and does not belong in the OEIS. - N. J. A. Sloane, Mar 18 2004

STATUS

approved