160802domain: NAppears in sequencesa(0)=1; a(n+1) = 1 + f(a(n))^2, where f(x) is the largest prime factor of x (A006530).at n=8A072268Prime(prime(n))^2+1.at n=21A092774a(n) = (n^2+1)^2+1.at n=20A178390Sum of the parts of all partitions of n-1 plus the sum of the emergent parts of the partitions of n.at n=29A182707