464646

Appears in sequences

• 6-almost primes with semiprime digits (digits 4, 6, 9 only).at n=39A111730
• Consider a decimal number of k>=2 digits x = d_(k)*10^(k-1) + d_(k-1)*10^(k-2) + … + d_(2)*10 + d_(1) and the transform T(x)-> (d_(k)+d_(k-1) mod 10)*10^(k-1) + (d_(k-1)+d_(k-2) mod 10)*10^(k-2) + … + (d_(2)+d_(1) mod 10)*10 + (d_(1)+d(k) mod 10). Sequence lists the numbers x such that T(x)=0.at n=39A243994
• Smallest m >= 2*n such that binomial(m,n) is a multiple of m-i for all 0<=i<n, but one.at n=20A389360