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%I M0028 #16 Aug 23 2015 12:10:42
%S 1,-1,0,0,1,0,1,0,2,0,3,1,6,2,9,6,16
%N Bosonic string states.
%C See the reference for precise definition.
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H T. Curtright, <a href="http://inspirehep.net/record/234762/files/CountingStringStates.pdf">Counting symmetry patterns in the spectra of strings</a>, in H. J. de Vega and N. Sánchez, editors, String Theory, Quantum Cosmology and Quantum Gravity. Integrable and Conformal Invariant Theories. World Scientific, Singapore, 1987, pp. 304-333, Table 2.
%K sign
%O 0,9
%A _N. J. A. Sloane_