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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A090485 a(n) = Floor[(Exp[n/PrimePi[n]]-1)/Log[n]]. 0
9, 3, 4, 2, 3, 2, 3, 3, 4, 3, 4, 3, 3, 4, 4, 3, 4, 3, 3, 4, 4, 3, 4, 4, 5, 5, 6, 5, 5, 4, 5, 5, 5, 6, 7, 5, 6, 6, 7, 6, 6, 5, 5, 6, 6, 5, 6, 6, 6, 7, 7, 6, 7, 7, 7, 8, 8, 7, 8, 6, 7, 7, 8, 8, 9, 7, 8, 8, 9, 7, 8, 7, 7, 8, 8, 8, 9, 8, 8, 8, 9, 8, 8, 8, 9, 9, 10, 8, 9, 9, 9, 10, 10, 11, 11, 10, 10, 11, 11, 10 (list; graph; refs; listen; history; internal format)
OFFSET

2,1

COMMENTS

The Shannon signal power of the distribution of the Primes.

REFERENCES

C. E. Shannon, The Mathematical Theory of Communication, page 100.

MATHEMATICA

digits=200 f[n_]=Floor[(Exp[n/PrimePi[n]]-1)/Log[n]] a=Table[f[n], {n, 2, digits}]

CROSSREFS

Sequence in context: A097902 A139425 A191689 * A021521 A011011 A070634

Adjacent sequences:  A090482 A090483 A090484 * A090486 A090487 A090488

KEYWORD

nonn

AUTHOR

Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Feb 01 2004

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 16 02:51 EST 2012. Contains 205860 sequences.