A002888 - OEIS

%I M1919 N0757 #24 Jul 31 2024 09:14:45

%S 1,2,9,20,670

%N a(n) is the cutting number of the tree corresponding to A002887(n).

%D Frank Harary and Phillip 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.

%D N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

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

%H Frank Harary and Phillip A. Ostrand, <a href="https://doi.org/10.1016/0012-365X(71)90003-3">The cutting center theorem for trees</a>, Discrete Mathematics, 1 (1971), 7-18.

%Y Cf. A002887, A331237.

%K nonn,more

%O 1,2

%A _N. J. A. Sloane_

%E Title improved by _Sean A. Irvine_, Jan 16 2020