218839

Properties

Appears in sequences

• Trajectory of 3 under map n->39n+1 if n odd, n->n/2 if n even.at n=9A037117
• a(n) = Prime(tribonacci(n)).at n=17A113842
• Prime numbers p such that the set of composite numbers in the range [p+1, nextprime(p)-1] has more than one element and all the elements have the same number of divisors.at n=26A332740
• Prime numbersat n=19513