In the '3x+1' problem, these values for the starting value set new records for number of steps to reach 1.

A033958

In the '3x+1' problem, these values for the starting value set new records for number of steps to reach 1.

Terms

    a(0) =1a(1) =3a(2) =7a(3) =9a(4) =25a(5) =27a(6) =73a(7) =97a(8) =129a(9) =171a(10) =231a(11) =313a(12) =327a(13) =703a(14) =871a(15) =1161a(16) =2463a(17) =2919a(18) =3711a(19) =6171a(20) =10971a(21) =13255a(22) =17647a(23) =23529a(24) =26623a(25) =34239a(26) =35655a(27) =52527a(28) =77031a(29) =106239

External references