1,1

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

M. Gardner, Time Travel and Other Mathematical Bewilderments. Freeman, NY, 1988, p. 116.

Sequence in context: A082521 A138826 A138720 this_sequence A015164 A144469 A009101

Adjacent sequences: A006061 A006062 A006063 this_sequence A006065 A006066 A006067

nonn,bref

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