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A133176 Isotopy classes of unordered Latin bi-trades of size n. 0
0, 0, 0, 1, 0, 3, 1, 13, 7, 59, 70, 553, 1277, 7661, 32395, 199205, 1149306, 7752187, 53913897 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

LINKS

Table of n, a(n) for n=1..19.

I. M. Wanless, A computer enumeration of small latin trades, Australas. J. Combin. 39, (2007) 247-258.

CROSSREFS

Cf. A007083.

Sequence in context: A096773 A118384 A258239 * A089435 A152474 A088814

Adjacent sequences:  A133173 A133174 A133175 * A133177 A133178 A133179

KEYWORD

nonn,more

AUTHOR

Ian Wanless, Oct 11 2007

STATUS

approved

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Last modified July 14 18:26 EDT 2020. Contains 335729 sequences. (Running on oeis4.)