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!)
A066503 a(n) = n - squarefree kernel of n, A007947. 13
0, 0, 0, 2, 0, 0, 0, 6, 6, 0, 0, 6, 0, 0, 0, 14, 0, 12, 0, 10, 0, 0, 0, 18, 20, 0, 24, 14, 0, 0, 0, 30, 0, 0, 0, 30, 0, 0, 0, 30, 0, 0, 0, 22, 30, 0, 0, 42, 42, 40, 0, 26, 0, 48, 0, 42, 0, 0, 0, 30, 0, 0, 42, 62, 0, 0, 0, 34, 0, 0, 0, 66, 0, 0, 60, 38, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

a(A005117(n)) = 0.

LINKS

Harry J. Smith, Table of n, a(n) for n = 1..1000

PROG

(PARI) { for (n=1, 1000, f=factor(n); k=1; for(i=1, matsize(f)[1], k*=f[i, 1]); write("b066503.txt", n, " ", n - k) ) } \\ Harry J. Smith, Feb 18 2010

CROSSREFS

Sequence in context: A212148 A048146 A028973 * A057385 A231108 A231285

Adjacent sequences:  A066500 A066501 A066502 * A066504 A066505 A066506

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Jan 04 2002

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 February 28 11:08 EST 2020. Contains 332323 sequences. (Running on oeis4.)