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A081081 Number of labeled, connected ortho-projection graphs on n vertices. 2
2, 0, 2, 6, 22, 330, 3194, 65142, 1502134 (list; graph; refs; listen; history; text; internal format)
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

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Last modified April 14 01:17 EDT 2021. Contains 342941 sequences. (Running on oeis4.)