login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A022927 Number of integers m such that 5^n < 3^m < 5^(n+1). 2

%I #10 Mar 01 2024 06:21:08

%S 1,1,2,1,2,1,2,1,2,1,2,1,2,1,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,1,2,1,2,1,

%T 2,1,2,1,2,1,2,1,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,1,2,1,2,1,2,1,2,1,2,1,

%U 2,1,2,1,1,2,1,2,1,2,1,2,1,2,1,2,1,1,2,1,2,1,2,1,2,1,2,1,2,1,2

%N Number of integers m such that 5^n < 3^m < 5^(n+1).

%H Amiram Eldar, <a href="/A022927/b022927.txt">Table of n, a(n) for n = 0..10000</a>

%F Asymptotic mean: lim_{m->oo} (1/m) * Sum_{k=1..m} a(k) = log_3(5) (A113209). - _Amiram Eldar_, Mar 01 2024

%e From _Amiram Eldar_, Mar 01 2024: (Start)

%e a(0) = 1 because 5^0 = 1 < 3^1 = 3 < 5^1 = 5.

%e a(1) = 1 because 5^1 = 5 < 3^2 = 9 < 5^2 = 25.

%e a(2) = 2 because 5^2 = 25 < 3^3 = 27 < 3^4 = 81 < 5^3 = 125. (End)

%t Join[{1}, Differences@ Table[Floor[n * Log[3, 5]], {n, 1, 100}]] (* _Amiram Eldar_, Mar 01 2024 *)

%Y Cf. A022922, A113209.

%K nonn,easy

%O 0,3

%A _Clark Kimberling_

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 19 04:26 EDT 2024. Contains 371782 sequences. (Running on oeis4.)