1,1

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

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

J. J. Sylvester, Collected Mathematical Papers, Vols. 1-4, Cambridge Univ. Press, 1904-1912, Vol. 4, p. 551.

J. J. Sylvester, The collected mathematical papers of James Joseph Sylvester, vol. 2, vol. 3, vol. 4.

Sequence in context: A093040 A022935 A048229 this_sequence A062822 A175029 A113728

Adjacent sequences: A002087 A002088 A002089 this_sequence A002091 A002092 A002093

nonn

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