3,2

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

R. E. Peile, Some Topics in Combinatorial Theory. Ph. D. Dissertation, Oxford University, 1979.

Sequence in context: A052318 A141309 A057997 this_sequence A103898 A140383 A029913

Adjacent sequences: A005270 A005271 A005272 this_sequence A005274 A005275 A005276

nonn

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