0,2

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

W. G. Brown, Enumeration of triangulations of the disk, Proc. London Math. Soc., 14 (1964), 746-768.

Sequence in context: A134927 A088556 A137966 this_sequence A002222 A006359 A001553

Adjacent sequences: A005495 A005496 A005497 this_sequence A005499 A005500 A005501

nonn

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