162450

Appears in sequences

• Numbers k for which phi(k) + anti-phi(k) = k.at n=35A066418
• Easter occurrences on March 22, March 23, ..., April 25 during a 5,700,000-year Gregorian Easter cycle.at n=30A224110
• a(n) is the smallest number satisfying a(n)^2+1 = p(n)*q(n), p(n) < q(n) both prime, such that q(n+1)/p(n+1) < q(n)/p(n) with the initial condition q(1)/p(1) < 3/2.at n=16A261803
• a(n) = Product_{d|n, d>1} prime(A286378(d)-1).at n=29A317944
• Numbers m such that m^2 + 1 = p*q with p, q primes and m = (p + q)/2 - 1.at n=12A348594