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!)
A232928 a(n) is the smallest q such that the primes<=q generate the multiplicative group modulo n. 0
2, 3, 2, 5, 3, 5, 2, 3, 2, 7, 2, 3, 7, 5, 3, 5, 2, 11, 5, 7, 5, 13, 2, 5, 2, 5, 2, 11, 3, 5, 5, 3, 3, 7, 2, 3, 7, 11, 3, 11, 3, 7, 7, 5, 5, 13, 3, 3, 5, 5, 2, 5, 3, 11, 5, 3, 2, 13, 2, 3, 5, 5, 3, 7, 2, 5, 5, 19, 7, 13, 5, 5, 7, 7, 3, 7, 3, 11, 2, 5, 2, 13, 3, 3, 5, 7, 3, 11, 3, 5, 11, 5, 7, 13, 5, 3, 5, 11, 2, 7, 3, 11, 13, 3, 2, 7, 3, 7, 11, 11, 3, 13, 7, 7, 7, 11, 11, 17 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..120.

E. Bach and L. Huelsbergen, Statistical evidence for small generating sets, Math. Comp. 61 (1993) 69-82.

S. R. Finch, Average least nonresidues, December 4, 2013. [Cached copy, with permission of the author]

P. Pollack, The average least quadratic nonresidue modulo m and other variations on a theme of Erdos, J. Number Theory 132 (2012) 1185-1202.

CROSSREFS

Sequence in context: A131470 A255709 A285512 * A026235 A086281 A097975

Adjacent sequences:  A232925 A232926 A232927 * A232929 A232930 A232931

KEYWORD

nonn

AUTHOR

Steven Finch, Dec 02 2013

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.)