Numbers with more than one Collatz tripling step whose odd Collatz trajectory does not contain primes.

A319936

Numbers with more than one Collatz tripling step whose odd Collatz trajectory does not contain primes.

Terms

    a(0) =113a(1) =227a(2) =453a(3) =906a(4) =909a(5) =1812a(6) =1813a(7) =1818a(8) =2417a(9) =3624a(10) =3626a(11) =3636a(12) =3637a(13) =7248a(14) =7252a(15) =7253a(16) =7272a(17) =7281a(18) =9669a(19) =14496a(20) =14504a(21) =14544a(22) =14549a(23) =14562a(24) =14563a(25) =19338a(26) =28992a(27) =29008a(28) =29013a(29) =29088

External references