OFFSET
1,1
COMMENTS
When any term in the sequence is iterated using the Collatz function, its trajectory's only odd number before reaching 1 will be 85.
Also, each term would have 2n+10 steps as its stopping time (A006577).
LINKS
EXAMPLE
When n=5, a(5) = 29013 and when iterated using the Collatz function will have the following trajectory: 87040,43520,21760,10880,5440,2720,1360,680,340,170,85,256,128,64,32,16,8,4,2,1
MATHEMATICA
(85*4^Range[25] - 1)/3 (* Wesley Ivan Hurt, Nov 10 2023 *)
PROG
(PARI) a(n) = 85*4^n\3 \\ Charles R Greathouse IV, Sep 09 2022
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Krishna Kumar Arumugam, Sep 03 2022
EXTENSIONS
Simpler definition and more terms from Jon E. Schoenfield, Sep 09 2022
STATUS
approved