A133173 Species of ordered Latin bi-trades of size n.

0, 0, 0, 1, 0, 1, 1, 5, 4, 19, 26, 163, 445, 2302, 10798, 63690, 381883, 2550827, 17945643

Offset

1,8

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: A108412 A205008 A133167 * A307675 A266707 A269695

Adjacent sequences: A133170 A133171 A133172 * A133174 A133175 A133176

Keyword

nonn,more

Author

Ian Wanless, Oct 11 2007

Status

approved