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

 Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS"). Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A076333 Squarefree kernels of nonsquarefree numbers. 2
 2, 2, 3, 6, 2, 6, 10, 6, 5, 3, 14, 2, 6, 10, 22, 15, 6, 7, 10, 26, 6, 14, 30, 21, 2, 34, 6, 15, 38, 10, 3, 42, 22, 30, 46, 6, 14, 33, 10, 26, 6, 14, 58, 39, 30, 11, 62, 5, 42, 2, 66, 15, 34, 70, 6, 21, 74, 30, 38, 51, 78, 10, 6, 82, 42, 13, 57, 86, 35, 22, 30, 46, 94, 21, 6, 14, 66 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Amiram Eldar, Table of n, a(n) for n = 1..10000 FORMULA a(n) = A007947(A013929(n)). MATHEMATICA f[n_] := If[(r = Times @@ FactorInteger[n][[;; , 1]]) < n, r , 0]; Select[f /@ Range[200], # > 0 &] (* Amiram Eldar, Sep 07 2020 *) CROSSREFS Cf. A007947, A013929. Sequence in context: A207621 A209157 A284785 * A015051 A260389 A291372 Adjacent sequences:  A076330 A076331 A076332 * A076334 A076335 A076336 KEYWORD nonn AUTHOR Reinhard Zumkeller, Nov 06 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.

Last modified December 1 09:28 EST 2020. Contains 338833 sequences. (Running on oeis4.)