OFFSET
1,1
COMMENTS
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
EXAMPLE
a(13) = 42 = 2*3*7. It is squarefree, composite and 7 > sqrt(42) = 6.4807...
MAPLE
filter:= proc(n)
if isprime(n) or not numtheory:-issqrfree(n) then return false fi;
max(numtheory:-factorset(n))^2 > n
end proc:
select(filter, [$2..1000]); # Robert Israel, Nov 04 2019
MATHEMATICA
JaggedQ[n_] := If[Last[FactorInteger[n]][[1]]>Sqrt[n], True, False]; Select[Range[200], JaggedQ[#]&&SquareFreeQ[#]&&!PrimeQ[#] &]
PROG
(PARI) lista(nn) = {forcomposite(n=1, nn, if (issquarefree(n), my(f = factor(n)); if (f[#f~, 1]^2 > n, print1(n, ", "))); ); } \\ Michel Marcus, Dec 15 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
Frank M Jackson, Dec 13 2015
STATUS
approved