91672domain: NAppears in sequencesSmallest number that is the largest value in the Collatz (3x + 1) trajectories of exactly n initial values. (a(n)=0 if no such number exists.)at n=34A233293a(n) = 4*n*(n^2 - 3*n - 1)/3.at n=42A275876Sum of the fourth powers of the parts in the partitions of n into two parts.at n=13A294271