0,4

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).

Austin, T. L.; Fagen, R. E.; Penney, W. F.; Riordan, John; The number of components in random linear graphs. Ann. Math. Statist 30 1959 747-754.

Sequence in context: A006147 A061236 A001784 this_sequence A033590 A006175 A058810

Adjacent sequences: A001863 A001864 A001865 this_sequence A001867 A001868 A001869

nonn

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