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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A105803 Self-describing sequence: 4 composite numbers, then 6 prime numbers, then 8 composites, then 9 primes, then 11 composites, etc. 0
4, 6, 8, 9, 11, 13, 17, 19, 23, 29, 30, 32, 33, 34, 35, 36, 38, 39, 41, 43, 47, 53, 59, 61, 67, 71, 73, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,1

LINKS

Table of n, a(n) for n=4..41.

EXAMPLE

4 6 8 9 11 13 17 19 23 29 30 32 33 34 35 36 38 39 ...

^ ^ ^ ^ -- -- -- -- -- -- ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^

...4............6....................8................................

..comp........primes.............composites

CROSSREFS

Sequence in context: A024887 A067611 A190485 * A202268 A084985 A068631

Adjacent sequences:  A105800 A105801 A105802 * A105804 A105805 A105806

KEYWORD

base,easy,nonn

AUTHOR

Eric Angelini, May 05 2005

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 March 22 10:07 EDT 2019. Contains 321421 sequences. (Running on oeis4.)