1,3

R. C. Read, Graphical enumeration by cycle-index sums: first steps toward a unified treatment, preprint, Sept. 26, 1991.

Reference gives generating functions.

A048172=A048173+A048174.

Adjacent sequences: A048171 A048172 A048173 this_sequence A048175 A048176 A048177

Sequence in context: A084363 A050352 A112939 this_sequence A058350 A134281 A051154

nonn,easy,nice,more

njas