0,3

R. C. Read, On the enumeration of a class of plane multigraphs, Aequat. Math., 31 (1986), 47-63.

Sequence in context: A026558 A137952 A005754 this_sequence A102286 A123764 A013204

Adjacent sequences: A007159 A007160 A007161 this_sequence A007163 A007164 A007165

nonn

njas