[go: up one dir, main page]

login
A191695
a(n) = floor((5^n)/(3^n - 2^n)).
2
5, 5, 6, 9, 14, 23, 37, 61, 101, 168, 278, 462, 769, 1280, 2131, 3550, 5913, 9853, 16418, 27359, 45594, 75985, 126636, 211055, 351751, 586244, 977065, 1628433, 2714045, 4523397, 7538982, 12564956, 20941578, 34902612, 58171000, 96951645, 161586051, 269310058
OFFSET
1,1
LINKS
FORMULA
a(n) = (5/3)^n + (10/9)^n + O(1). - Charles R Greathouse IV, Mar 14 2022
MATHEMATICA
f[n_] := Floor[(5^n)/(3^n-2^n)]
Table[f[n], {n, 1, 40}] (* A191695 *)
PROG
(Magma) [Floor((5^n)/(3^n-2^n)): n in [1..40] ]; // Vincenzo Librandi, Sep 10 2011
(PARI) a(n)=5^n\(3^n-2^n) \\ Charles R Greathouse IV, Mar 14 2022
CROSSREFS
Cf. A191696.
Sequence in context: A175476 A376743 A019528 * A298915 A008945 A008705
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Jun 11 2011
EXTENSIONS
Mathematica program corrected by Harvey P. Dale, Mar 20 2013
STATUS
approved