A133426 Analog of A060410 for the 7x+1 problem (cf. A133421).

8, 50, 162, 470, 9584, 28400, 91890, 193040, 265070, 291824, 337100, 388830, 524070, 3231824, 18052070, 30949850, 31021880, 65552768, 774659600, 10276607888, 38128783428, 190067750300, 4835458627140, 25515567812750

Offset

1,1

Comments

The 7x+1 map sends x to x/2 if x is even, x/3 if x is divisible by 3, x/5 if x is divisible by 5, otherwise 7x+1.

Links

N. J. A. Sloane, Table of n, a(n) for n=1..53 (from the web page of Tomás Oliveira e Silva)

Tomás Oliveira e Silva, The px+1 problem

Index entries for sequences related to 3x+1 (or Collatz) problem

Crossrefs

Cf. A133421, A133425, A133419, ...

Sequence in context: A300877 A301487 A299686 * A212063 A300318 A290617

Adjacent sequences: A133423 A133424 A133425 * A133427 A133428 A133429

Keyword

nonn

Author

N. J. A. Sloane, Nov 27 2007

Status

approved