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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A240104 Numbers with primitive root -19. 4
2, 3, 6, 13, 26, 29, 31, 37, 41, 53, 58, 59, 62, 67, 71, 74, 79, 82, 89, 103, 106, 107, 113, 118, 134, 142, 158, 167, 173, 178, 179, 193, 206, 214, 223, 226, 227, 257, 269, 281, 293, 317, 331, 334, 337, 346, 358, 379, 383, 386, 401, 431, 433, 439, 446, 449 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

pr = -19; Select[Range[2, 500], MultiplicativeOrder[pr, #] == EulerPhi[#] &]

CROSSREFS

Cf. numbers with positive primitive root r: A167791 (r=2), A167792 (r=3), A167793 (r=5), A167794 (r=6), A167795 (r=7), A167796 (r=8), A167797 (r=10), A240028 (r=11), A240030 (r=12), A240032 (r=13), A240094 (r=14), A240096 (r=15), A240101 (r=17), A240103 (r=18), A240106 (r=19).

Cf. numbers with negative primitive root r: A167798 (r=-2), A167799 (r=-3), A167800 (r=-4), A167801 (r=-5), A167802 (r=-6), A167803 (r=-7), A167804 (r=-8), A167805 (r=-9), A167806 (r=-10), A240029 (r=-11), A240031 (r=-12), A240093 (r=-13), A240095 (r=-14), A240097 (r=-15), A240100 (r=-17), A240102 (r=-18).

Sequence in context: A075530 A032061 A155996 * A018274 A018775 A086514

Adjacent sequences:  A240101 A240102 A240103 * A240105 A240106 A240107

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Apr 01 2014

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 November 19 00:12 EST 2019. Contains 329310 sequences. (Running on oeis4.)