116225

Appears in sequences

• Fibonacci sequence beginning 1, 10.at n=21A022100
• Becomes prime or 4 after exactly 10 iterations of f(x) = sum of prime factors of x.at n=24A048132
• Integers of the form Sum_{i=1..m} phi(i)/gcd(m,i).at n=18A066970
• a(1) = 2; thereafter, if a(n-1) is prime then a(n) = prime(n) + 1; otherwise a(n) = 2*a(n-1) - 1.at n=57A373801