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%I #13 Sep 20 2020 15:14:45
%S 1,2,2,2,0,2,2,2,2,0,2,2,2,2,0,4,2,2,2,0,0,2,4,2,0,2,2,2,2,0,2,0,2,2,
%T 0,2,4,2,2,0,2,4,0,4,0,2,2,2,0,0,4,2,2,0,0,2,2,2,2,0,2,2,2,2,0,0,2,4,
%U 2,0,2,4,2,2,0,0,2,2,4,0,4,2,0,2,0
%N Dirichlet g.f. = Product_{primes p == 1 mod 3} (1+p^(-s))/(1-p^(-s)).
%D Baake, Michael, and Peter AB Pleasants. "Algebraic solution of the coincidence problem in two and three dimensions." Zeitschrift für Naturforschung A 50.8 (1995): 711-717. See p. 713.
%D Baake, M. and P. A. B. Pleasants. "The coincidence problem for crystals and quasicrystals." Aperiodic, vol. 94, pp. 25-29. 1995.
%H Baake, Michael, and Peter AB Pleasants, <a href="/A031358/a031358.pdf">Algebraic solution of the coincidence problem in two and three dimensions</a>, Zeitschrift für Naturforschung A 50.8 (1995): 711-717. [Annotated scan of page 713 only].
%o (PARI) t1=direuler(p=2,2400,(1+(p%3<2)*X))
%o t2=direuler(p=2,2400,1/(1-(p%3<2)*X))
%o t3=dirmul(t1,t2)
%o t4=vector(200,n,t3[6*n+1]) \\ (and then prepend 1)
%Y Cf. A031358.
%K nonn
%O 0,2
%A _N. J. A. Sloane_, Nov 14 2019
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