A081081 Number of labeled, connected ortho-projection graphs on n vertices.

2, 0, 2, 6, 22, 330, 3194, 65142, 1502134

Offset

1,1

References

B. Shtylla and L. Zulli, Ortho-projection graphs, in preparation.

Links

Table of n, a(n) for n=1..9.

L. Zulli, Home Page

Crossrefs

Cf. A081080, A081082.

Sequence in context: A161803 A057980 A242840 * A111111 A185343 A161014

Adjacent sequences: A081078 A081079 A081080 * A081082 A081083 A081084

Keyword

hard,more,nonn

Author

B. Shtylla and L. Zulli (shtyllab(AT)lafayette.edu, zullil(AT)lafayette.edu), Mar 05 2003

Extensions

a(9) from Louis Zulli (zullil(AT)lafayette.edu), Aug 23 2004

Status

approved