6,1

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).

A. Cayley, On the partitions of a polygon, Proc. London Math. Soc., 22 (1891), 237-262 = Collected Mathematical Papers. Vols. 1-13, Cambridge Univ. Press, London, 1889-1897, Vol. 13, pp. 93ff.

Sequence in context: A074835 A060492 A112041 this_sequence A007220 A034866 A055315

Adjacent sequences: A002057 A002058 A002059 this_sequence A002061 A002062 A002063

nonn

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