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A107452 Number of nonisomorphic bipartite generalized Petersen graphs P(2n,k) on 4n vertices for 1<=k<n. 9
1, 1, 2, 2, 3, 2, 3, 3, 4, 3, 6, 4, 5, 6, 5, 5, 7, 5, 8, 8, 7, 6, 10, 8, 8, 9, 10, 8, 13, 8, 9, 12, 10, 12, 14, 10, 11, 14, 14, 11, 17, 11, 14, 17, 13, 12, 18, 14, 16 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,3

COMMENTS

The generalized Petersen graph P(n,k) is a graph with vertex set $V(P(n,k)) = \{u_0,u_1,\dots,u_{n-1},v_0,v_1,\dots,v_{n-1}\}$ and edge set $E(P(n,k)) = \{u_i u_{i+1}, u_i v_i, v_i v_{i+k} : i=0,\dots,n-1\},$ where the subscripts are to be read modulo $n$.

REFERENCES

I. Z. Bouwer, W. W. Chernoff, B. Monson and Z. Star, The Foster Census (Charles Babbage Research Centre, 1988), ISBN 0-919611-19-2.

M. Watkins, A theorem on Tait colorings with an application to the generalized Petersen graphs, J. Combin. Theory 6 (1969), 152-164.

LINKS

Table of n, a(n) for n=2..50.

Marko Boben, Tomaz Pisanski and Arjana Zitnik, I-graphs and the corresponding configurations, Preprint series (University of Ljubljana, IMFM), Vol. 42 (2004), 939 (ISSN 1318-4865).

EXAMPLE

A generalized Petersen graph P(n,k) is bipartite if and only if n is even and k is odd.

The smallest bipartite generalized Petersen graph is P(4,1)

CROSSREFS

Cf. A077105, A107453-A107460.

Sequence in context: A277329 A071330 A092333 * A205018 A286716 A029213

Adjacent sequences:  A107449 A107450 A107451 * A107453 A107454 A107455

KEYWORD

nonn

AUTHOR

Marko Boben (Marko.Boben(AT)fmf.uni-lj.si), Tomaz Pisanski and Arjana Zitnik (Arjana.Zitnik(AT)fmf.uni-lj.si), May 26 2005

STATUS

approved

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Last modified June 19 03:34 EDT 2018. Contains 305572 sequences. (Running on oeis4.)