Number of odd numbers k such that difference between halving and tripling steps in Collatz (3x+1) trajectory of k is n.
A222753
Number of odd numbers k such that difference between halving and tripling steps in Collatz (3x+1) trajectory of k is n.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =2a(4) =0a(5) =2a(6) =3a(7) =6a(8) =6a(9) =9a(10) =11a(11) =19a(12) =28a(13) =43a(14) =66a(15) =98a(16) =145a(17) =219a(18) =327a(19) =474a(20) =744a(21) =1125a(22) =1673a(23) =2481a(24) =3723a(25) =5600a(26) =8415a(27) =12630a(28) =18863a(29) =28395
External references
- oeis: A222753