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!)
A122907 Numbers n such that in Z/nZ the number of squares is greater than or equal to the number of invertible elements. 4
1, 2, 3, 4, 6, 10, 12, 14, 18, 22, 26, 30, 34, 38, 42, 46, 50, 54, 58, 62, 66, 70, 74, 78, 82, 86, 90, 94, 98, 102, 106, 114, 118, 122, 134, 138, 142, 146, 150, 158, 162, 166, 174, 178, 186, 194, 202, 206, 210, 214, 218, 222, 226, 242, 246, 250, 254, 258, 262, 274 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..60.

FORMULA

n such that A000224(n) >= A000010(n). Union of A122903 and A122905. Complement of A122904 in positive integers.

CROSSREFS

Cf. A122903, A122904, A122905, A122906.

Sequence in context: A225649 A225651 A191149 * A070519 A177913 A098392

Adjacent sequences:  A122904 A122905 A122906 * A122908 A122909 A122910

KEYWORD

nonn

AUTHOR

Max Alekseyev, Sep 18 2006

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 3 12:53 EST 2016. Contains 278738 sequences.