147432221domain: NPropertiesPrimalityPrimeyesAppears in sequencesDefine f(n,k) = floor[n/k] and a(n) = right concatenation of f(n,k) for k = 1 to int[(n+1)/2] or until one arrives at a 1.at n=13A068671Primes in A068671.at n=6A068672Prime numbersat n=8307994