3,1

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

R. C. Entringer and P. J. Slater, On the maximum number of cycles in a graph, Ars Combin., 11 (1981), 289-294.

Sequence in context: A012480 A063611 A146624 this_sequence A139597 A117747 A137196

Adjacent sequences: A006185 A006186 A006187 this_sequence A006189 A006190 A006191

nonn

N. J. A. Sloane (njas(AT)research.att.com).