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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A218861 First position of A218860(n) in A066135. 2
1, 2, 4, 8, 24, 48, 144, 288, 576, 1152, 2304, 3456, 4608, 9216, 11520, 16128, 18432, 20736, 25344, 29952, 36864, 39168, 43776, 52992, 59904, 66816, 85248, 99072, 108288 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..29.

MATHEMATICA

f[n_]:=(m = 2; While[Mod[DivisorSigma[n, m], m] > 0, m++]; m); s={}; sn={}; Do[m=f[n]; If[!MemberQ[s, m], AppendTo[s, m]; AppendTo[sn, n]], {n, 1, 1000}]; sn (* Amiram Eldar, Dec 18 2018 after T. D. Noe at A066135 *)

CROSSREFS

Sequence in context: A290859 A290659 A286866 * A078222 A078223 A291405

Adjacent sequences:  A218858 A218859 A218860 * A218862 A218863 A218864

KEYWORD

nonn,more

AUTHOR

T. D. Noe, Nov 24 2012

EXTENSIONS

More terms from Amiram Eldar, Dec 18 2018

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 19 03:24 EDT 2019. Contains 328211 sequences. (Running on oeis4.)