Numbers n such that in Collatz (3x+1) trajectory of n, the number of terms < n equals number of terms > n.

A217731

Numbers n such that in Collatz (3x+1) trajectory of n, the number of terms < n equals number of terms > n.

Terms

    a(0) =1a(1) =19a(2) =39a(3) =75a(4) =201a(5) =428a(6) =462a(7) =550a(8) =583a(9) =593a(10) =638a(11) =702a(12) =755a(13) =1486a(14) =2395a(15) =3023a(16) =3583a(17) =3867a(18) =5342a(19) =6998a(20) =7419a(21) =8283a(22) =10367a(23) =10447a(24) =10524a(25) =10567a(26) =10879a(27) =11219a(28) =12379a(29) =13647

External references