0,2

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

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

R. C. Mullin, E. Nemeth and P. J. Schellenberg, The enumeration of almost cubic maps, pp. 281-295 in Proceedings of the Louisiana Conference on Combinatorics, Graph Theory and Computer Science. Vol. 1, edited R. C. Mullin et al., 1970.

Sequence in context: A090004 A061631 A099912 this_sequence A123309 A051489 A047053

Adjacent sequences: A002002 A002003 A002004 this_sequence A002006 A002007 A002008

nonn

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