OFFSET
0,7
REFERENCES
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
T. L. Curtright and C. B. Thorn, Symmetry patterns in the mass spectra of dual string models, Nuclear Phys. B 274 (1986), 520-588. See Tables 6a and 6b.
T. L. Curtright and Charles B. Thorn, Spin content of the bosonic string, Physics Letters B 175.1 (1986): 47-52.
FORMULA
There is a g.f. due to J. Goldstone given in Eq. (5) of Curtright and Thorn (1986), and programmed in Maple below. - N. J. A. Sloane, Jul 11 2015
MAPLE
M:=101:
p:=mul((1-x^n)^(-1), n=1..M):
G1:=J-> p^2*add( x^(n*J+n*(n-1)/2)*(-1)^(n-1)*(1-x^n)^2, n=1..M):
G2:=J->series(G1(J), x, M);
G3:=J->seriestolist(G2(J));
G3(0); # N. J. A. Sloane, Jul 11 2015
CROSSREFS
KEYWORD
sign,easy
AUTHOR
STATUS
approved