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%I #8 Mar 30 2012 18:39:15
%S 1,2,4,7,10,12,40,139,172,183,527,538,882,11532,25022,25377,25732,
%T 26087,286602,547117,859806,1120321,1433010,2006214,3413137,5132749,
%U 5705953,10552100,15971451,21390802,26810153
%N Least positive integer multiples of angle x such that their direction cosines form a unit vector: sum(k>0, cos(a(k)*x)^2)=1, where a(1)=1 and x=2.
%o (PARI) x=2; z=cos(x)^2; a=1; for(n=1,35,b=a+1; while(z+cos(b*x)^2>1,b++); z=z+cos(b*x)^2; a=b; print1(b,","))
%Y Cf. A080136, A080138, A080139, A080140.
%K nonn
%O 1,2
%A _Paul D. Hanna_, Jan 30 2003
%E Extended with PARI program by _Benoit Cloitre_, Feb 04 2003
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