1,1

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).

F. Harary and P. A. Ostrand, How cutting is a cut point?, pp. 147-150 of R. K. Guy et al., editors, Combinatorial Structures and Their Applications (Proceedings Calgary Conference Jun 1969}), Gordon and Breach, NY, 1970.

Sequence in context: A098613 A143607 A032715 this_sequence A080034 A061447 A080591

Adjacent sequences: A002884 A002885 A002886 this_sequence A002888 A002889 A002890

nonn,more

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