login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A096835 Number of primes in the neighborhood of 3^n with radius Ceiling[Log[3^n]]. 0
3, 2, 3, 2, 2, 2, 1, 3, 2, 2, 0, 0, 1, 3, 3, 0, 2, 2, 2, 3, 2, 4, 1, 3, 3, 2, 3, 2, 1, 2, 2, 1, 0, 1, 2, 5, 2, 3, 0, 2, 4, 1, 0, 3, 3, 2, 2, 1, 3, 3, 2, 1, 2, 3, 2, 2, 5, 0, 3, 2, 2, 3, 4, 0, 1, 3, 0, 1, 4, 0, 2, 1, 1, 2, 3, 2, 3, 1, 2, 3, 3, 0, 0, 1, 2, 2, 2, 2, 2, 2, 5, 3, 0, 1, 6, 1, 4, 5, 1, 2, 3, 2, 1, 1, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..105.

FORMULA

a[n] equals almost A096509(3^n)>=a(n) because here only primes are counted, the true prime powers not.

CROSSREFS

Cf. A096509-A096523, A096830-A096840.

Sequence in context: A096839 A099891 A241173 * A237838 A262880 A249355

Adjacent sequences:  A096832 A096833 A096834 * A096836 A096837 A096838

KEYWORD

nonn

AUTHOR

Labos Elemer, Jul 14 2004

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 23 12:54 EDT 2019. Contains 328345 sequences. (Running on oeis4.)