123060

Appears in sequences

• Initial values for f(x)=phi(sigma(x)) such that iteration of f ends in cycle of length=11.at n=21A096888
• Smallest number m containing no zeros in base n representation but at least one zero in all base b representations with 1<b<n.at n=16A106372
• Number of (w,x,y,z) with all terms in {1,...,n} and w < harmonic mean of {x,y,z}.at n=24A212106