login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A125517 Number of prime 5-tuples up to 10^n. 0
0, 3, 5, 9, 21, 65, 321, 1383, 7221, 40414, 245312, 1552223, 10217560, 69410576, 485081195, 3473135825 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
EXAMPLE
a(3)=5 because there are 5 prime 5-tuples less than 10^3: 3 of the form p + 0,2,6,8,12 (for p = 5,11 and 101) and 2 of the form p + 0,4,6,10,12 (for p = 7 and 97).
CROSSREFS
Sequence in context: A147758 A129787 A328525 * A147038 A146275 A089636
KEYWORD
nonn,more
AUTHOR
Martin Raab, Jan 21 2007
EXTENSIONS
a(13)-a(15) from Norman Luhn, Nov 05 2021
a(16) from Norman Luhn, Nov 09 2021
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 28 07:48 EDT 2024. Contains 371235 sequences. (Running on oeis4.)