Smallest number to give 2^(2n) in a hailstone (or 3x + 1) sequence.

A054646

Smallest number to give 2^(2n) in a hailstone (or 3x + 1) sequence.

Terms

    a(0) =1a(1) =3a(2) =21a(3) =75a(4) =151a(5) =1365a(6) =5461a(7) =14563a(8) =87381a(9) =184111a(10) =932067a(11) =5592405a(12) =13256071a(13) =26512143a(14) =357913941a(15) =1431655765a(16) =3817748707a(17) =22906492245a(18) =91625968981a(19) =244335917283

External references