A133176 Isotopy classes of unordered Latin bi-trades of size n.

0, 0, 0, 1, 0, 3, 1, 13, 7, 59, 70, 553, 1277, 7661, 32395, 199205, 1149306, 7752187, 53913897

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: A118384 A341725 A258239 * A089435 A152474 A088814

Adjacent sequences: A133173 A133174 A133175 * A133177 A133178 A133179

Keyword

nonn,more

Author

Ian Wanless, Oct 11 2007

Status

approved