a(n) is the smallest number having n as the largest number of distinct prime factors of any term in its 3x+1 trajectory.
A087975
a(n) is the smallest number having n as the largest number of distinct prime factors of any term in its 3x+1 trajectory.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =15a(4) =210a(5) =703a(6) =20895a(7) =239263a(8) =4497567a(9) =28203751a(10) =2222250495a(11) =103612115103
External references
- oeis: A087975