A081082 Number of unlabeled, connected ortho-projection graphs on n vertices.

2, 0, 2, 1, 4, 5, 14, 31, 84, 258

Offset

1,1

References

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

Links

Table of n, a(n) for n=1..10.

L. Zulli, Home Page

Crossrefs

Cf. A081080, A081081.

Sequence in context: A260574 A058707 A242691 * A049785 A036997 A116900

Adjacent sequences: A081079 A081080 A081081 * A081083 A081084 A081085

Keyword

nonn,hard,more

Author

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

Extensions

a(9)-a(10) from Sean A. Irvine, Oct 09 2025

Status

approved