4,2

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

P. Lisonek, Closed forms for the number of polygon dissections. Journal of Symbolic Computation 20 (1995), 595-601.

R. C. Read, On general dissections of a polygon, Aequat. Math. 18 (1978), 370-388.

Sequence in context: A148716 A148717 A148718 this_sequence A148719 A138541 A148720

Adjacent sequences: A003446 A003447 A003448 this_sequence A003450 A003451 A003452

nonn

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