1,1
R. Haas, Three-colorings of finite groups or an algebra of nonequalities, Math. Mag., 63 (1990), 211-225.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
Sequence in context: A027917 A038347 A117495 * A006308 A008837 A176098
Adjacent sequences: A007684 A007685 A007686 * A007688 A007689 A007690
nonn
N. J. A. Sloane (njas(AT)research.att.com).
