A350213 a(n) is the smallest odd number k > 1 whose Collatz trajectory contains n odd terms other than 1, all of which are < 2k.

5, 3, 75, 889599926394171, 1503602507542081191567576988391237674543140475, 83276272814888934795930294359718745998045560658956598133222411254239724160031227

Offset

1,1

Comments

a(7) is too large to list here.

Links

Table of n, a(n) for n=1..6.

Crossrefs

Cf. A006370.

Sequence in context: A109254 A258091 A370551 * A255599 A180403 A343582

Adjacent sequences: A350210 A350211 A350212 * A350214 A350215 A350216

Keyword

nonn

Author

Jon E. Schoenfield, Dec 19 2021

Status

approved