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%I #5 Jan 24 2019 03:56:55
%S 8954982400,146700521676800,273857689763840,8383654522880000
%N Consider pairs of numbers m,n such that UnitaryPhi(m)=UnitaryPhi(n)= (3*m^(1/2)-2*n^(1/2))^2, m<n. Sequence gives m.
%C If m=n then only one example m=n=1 exists.
%e Factorization :
%e 2^12*5^2*7*13*31^2
%e 2^13*5^2*7*13*8191*31^2
%e 2^14*5*7^2*13*43*127*31^2
%e 2^15*5^4*7*13*31*151*31^2
%Y Cf. A047994, A144648.
%K nonn,more
%O 1,1
%A _Yasutoshi Kohmoto_, Jan 19 2009