A156803 Number of equivalence classes of bipartite graphs on n nodes up to sequences of edge local complementation and isomorphism.

1, 2, 3, 6, 10, 22, 43, 104, 250, 720, 2229, 8361, 36441, 199610, 1395326

Offset

1,2

Comments

Also equal to the number of inequivalent binary linear codes of length n plus the number of inequivalent isodual binary linear codes of length n, divided by two.

Links

Table of n, a(n) for n=1..15.

L. E. Danielsen and M. G. Parker, Edge local complementation and equivalence of binary linear codes, Des. Codes Cryptogr., 49 (2008), 161-170.

L. E. Danielsen, Database of Pivot Orbits.

Crossrefs

A034343

Sequence in context: A032202 A125702 A052817 * A002992 A130867 A218210

Adjacent sequences: A156800 A156801 A156802 * A156804 A156805 A156806

Keyword

hard,nonn

Author

Lars Eirik Danielsen (larsed(AT)ii.uib.no), Feb 16 2009

Status

approved