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

 

Logo

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A020940 Greatest k such that (k-th prime) < (10 times n-th prime). 8
8, 10, 15, 19, 29, 31, 39, 42, 50, 61, 63, 73, 80, 82, 91, 99, 107, 111, 121, 127, 129, 138, 145, 154, 163, 169, 172, 180, 181, 189, 205, 214, 219, 221, 237, 239, 247, 258, 263, 269, 278, 279, 292, 293, 297, 300, 317, 331, 337, 340, 344, 355, 357, 368, 375 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..55.

CROSSREFS

Sequence in context: A063190 A101763 A154568 * A242732 A270796 A058633

Adjacent sequences:  A020937 A020938 A020939 * A020941 A020942 A020943

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling

EXTENSIONS

More terms from James A. Sellers

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 December 4 23:10 EST 2016. Contains 278755 sequences.