1,2

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

Foulds, L. R.; Robinson, R. W. Enumeration of binary phylogenetic trees. Combinatorial mathematics, VIII (Geelong, 1980), pp. 187-202, Lecture Notes in Math., 884, Springer, Berlin-New York, 1981. Math. Rev. 83a:05071.

Index entries for sequences related to trees

Sequence in context: A167018 A094070 A119022 this_sequence A115852 A058381 A094651

Adjacent sequences: A006679 A006680 A006681 this_sequence A006683 A006684 A006685

nonn

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