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

 

Logo

Annual Appeal: Please make a donation to keep the OEIS running. In 2018 we replaced the server with a faster one, added 20000 new sequences, and reached 7000 citations (often saying "discovered thanks to the OEIS").
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A060568 Number of primes between n and R(n) where R(n) (A004086) is the digit reversal of n. 1
0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 3, 4, 6, 9, 11, 12, 15, 16, 7, 3, 0, 2, 4, 6, 9, 11, 13, 14, 8, 4, 2, 0, 2, 4, 7, 8, 10, 12, 10, 6, 4, 2, 0, 2, 4, 6, 8, 9, 12, 9, 6, 4, 2, 0, 2, 5, 7, 7, 14, 11, 9, 7, 4, 2, 0, 2, 4, 5, 15, 12, 11, 8, 6, 5, 2, 0, 2, 2, 18, 15, 13, 10, 8, 7, 4, 2, 0, 1, 20, 16, 14 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,10

LINKS

Table of n, a(n) for n=1..92.

EXAMPLE

a(10) = 4, as there are four primes between 10 and 1.

CROSSREFS

Sequence in context: A119708 A106142 A092512 * A073466 A062525 A085655

Adjacent sequences:  A060565 A060566 A060567 * A060569 A060570 A060571

KEYWORD

nonn,base,easy

AUTHOR

Amarnath Murthy, Apr 27 2001

EXTENSIONS

More terms from Larry Reeves (larryr(AT)acm.org), May 10 2001

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 December 11 10:48 EST 2018. Contains 318049 sequences. (Running on oeis4.)