Number of terms k such that difference between halving and tripling steps in Collatz (3x+1) trajectory of k is n.
A213678
Number of terms k such that difference between halving and tripling steps in Collatz (3x+1) trajectory of k is n.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =3a(5) =5a(6) =8a(7) =14a(8) =20a(9) =29a(10) =40a(11) =59a(12) =87a(13) =130a(14) =196a(15) =294a(16) =439a(17) =658a(18) =985a(19) =1459a(20) =2203a(21) =3328a(22) =5001a(23) =7482a(24) =11205a(25) =16805a(26) =25220a(27) =37850a(28) =56713a(29) =85108
External references
- oeis: A213678