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A069806 Smallest k > n such that the squarefree part of n divides the squarefree part of k. 1
2, 6, 6, 5, 10, 24, 14, 10, 10, 30, 22, 15, 26, 42, 30, 17, 34, 22, 38, 30, 42, 66, 46, 30, 26, 78, 30, 35, 58, 120, 62, 34, 66, 102, 70, 37, 74, 114, 78, 70, 82, 168, 86, 55, 55, 138, 94, 51, 50, 54, 102, 65, 106, 66, 110, 70, 114, 174, 118, 105, 122, 186, 70, 65 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
core[n_] := Times @@ (First[#]^Mod[Last[#], 2]& /@ FactorInteger[n]); a[n_] := Module[{k = n + 1, c = core[n]}, While[!Divisible[core[k], c], k++]; k]; Array[a, 100] (* Amiram Eldar, Sep 03 2020 *)
PROG
(PARI) for(s=1, 100, n=s+1; while(frac(core(n)/core(s))>0, n++); print1(n, ", "); )
CROSSREFS
Cf. A007913.
Sequence in context: A007507 A350031 A065486 * A123945 A291793 A284121
KEYWORD
easy,nonn
AUTHOR
Benoit Cloitre, May 01 2002
STATUS
approved

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Last modified March 2 01:29 EST 2024. Contains 370447 sequences. (Running on oeis4.)