login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A055943 Smallest k >1 such that k | Sigma(k) - n. 0
6, 2, 20, 2, 3, 2, 5, 2, 7, 2, 3, 2, 6, 2, 13, 2, 3, 2, 6, 2, 19, 2, 3, 2, 6, 2, 5, 2, 3, 2, 6, 2, 21, 2, 3, 2, 5, 2, 10, 2, 3, 2, 6, 2, 43, 2, 3, 2, 6, 2, 7, 2, 3, 2, 6, 2, 5, 2, 3, 2, 6, 2, 20, 2, 3, 2, 5, 2, 10, 2, 3, 2, 6, 2, 21, 2, 3, 2, 6, 2, 14, 2, 3, 2, 6, 2, 5, 2, 3, 2, 6, 2, 7, 2, 3, 2, 5, 2, 10 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..98.

MATHEMATICA

Do[ k = 2; While[ Mod[ DivisorSigma[ 1, k ] - n, k ]!=0, k++ ]; Print[ k ], {n, 0, 100} ]

CROSSREFS

Sequence in context: A266711 A248269 A081778 * A319313 A277275 A213503

Adjacent sequences:  A055940 A055941 A055942 * A055944 A055945 A055946

KEYWORD

easy,nonn

AUTHOR

Robert G. Wilson v, Jul 18 2000

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 January 28 22:40 EST 2020. Contains 331328 sequences. (Running on oeis4.)