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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A049035 Number of pairs of twin primes whose smaller element is <= 10^n-th prime. 1
5, 25, 174, 1270, 10250, 86027, 738597, 6497407 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..8.

Index entries for sequences related to numbers of primes in various ranges

EXAMPLE

a(1)=5 since the 10th prime is 29 and the first 5 twin primes are {3,5}, {5,7}, {11,13}, {17,19} and {29,31}.

CROSSREFS

See A093683 for another version.

Sequence in context: A035341 A258369 A137383 * A047897 A204461 A121144

Adjacent sequences:  A049032 A049033 A049034 * A049036 A049037 A049038

KEYWORD

nonn

AUTHOR

Dennis S. Kluk (mathemagician(AT)ameritech.net)

EXTENSIONS

More terms from Labos Elemer, Oct 13 2000; Jud McCranie, Dec 30 2000

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified September 26 15:27 EDT 2017. Contains 292531 sequences.