566231040

Appears in sequences

• a(n) = least positive integer k satisfying Omega(k) = Omega(k+1)+Omega(k+2)....+Omega(k+n), where Omega = A001222 = number of prime factors, counting multiplicity.at n=7A076804
• Number of subsets of {1,.., n} containing no twin prime pairs.at n=30A089827
• One quarter the number of n X n 1..4 arrays with no two neighbors of any element equal to each other.at n=10A183353
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 838", based on the 5-celled von Neumann neighborhood.at n=29A290547
• a(n) = Product_{k=1..n} phi(prime(k)-1).at n=13A338364