a(n) is the smallest number whose Collatz ('3x+1') trajectory crosses its initial value exactly n times.
A301937
a(n) is the smallest number whose Collatz ('3x+1') trajectory crosses its initial value exactly n times.
Terms
- a(0) =1a(1) =3a(2) =10a(3) =7a(4) =6a(5) =9a(6) =22a(7) =19a(8) =14a(9) =25a(10) =18a(11) =83a(12) =62a(13) =33a(14) =54a(15) =559a(16) =108a(17) =109a(18) =110a(19) =97a(20) =188a(21) =147a(22) =166a(23) =221a(24) =146a(25) =171a(26) =292a(27) =129a(28) =194a(29) =257
External references
- oeis: A301937