OFFSET
1,6
COMMENTS
a(4) = 1 is the P_4, a(5) = 1 is the C_5, and a(n) = 2 for even n >= 6 are the unique prime bipartite chain graph on n vertices and its complement. - Falk Hüffner, Jan 18 2016
LINKS
J. L. Fouquet, A Decomposition for a class of (P5,P5-bar)-free graphs, Discrete Math. 121 (1993) 75-83.
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Falk Hüffner, Jan 18 2016
STATUS
approved