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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A246855 Numbers n such that sigma(n+5) - sigma(n) = n + 5. 4
3577, 14773, 2843579 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Also numbers n such that A001065(n+5) = A000203(n). - Michel Marcus, Sep 06 2014

a(4) (if it exists) > 10^11. - Hiroaki Yamanouchi, Sep 10 2014

a(4) (if it exists) > 10^13. - Giovanni Resta, Jul 13 2015

LINKS

Table of n, a(n) for n=1..3.

EXAMPLE

Number 3577 is in sequence because sigma(3577+5) - sigma(3577) = 7800 - 4218 = 3582 = 3577 + 5.

PROG

(MAGMA) [n:n in[1..10^7] | SumOfDivisors(n+5)-SumOfDivisors(n) eq n+5]

(PARI)

for(n=1, 10^7, if(sigma(n+5)-sigma(n)==n+5, print1(n, ", "))) \\ Derek Orr, Sep 05 2014

CROSSREFS

Cf. A000203, A067816, A246851, A246852, A246853, A246854.

Sequence in context: A004932 A004952 A004972 * A252153 A234138 A249289

Adjacent sequences:  A246852 A246853 A246854 * A246856 A246857 A246858

KEYWORD

nonn,bref,more

AUTHOR

Jaroslav Krizek, Sep 05 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 October 21 11:42 EDT 2019. Contains 328296 sequences. (Running on oeis4.)