0,5

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

P. D. Lincoln, personal communication.

Cf. A006982, A006966.

Adjacent sequences: A006978 A006979 A006980 this_sequence A006982 A006983 A006984

Sequence in context: A088325 A006210 A096812 this_sequence A003427 A045648 A166354

nonn

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