OFFSET
1,1
COMMENTS
Nonsquare composites not divisible by 2,3,5.
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
EXAMPLE
377 = 13*29 is a term.
MAPLE
filter:= n -> igcd(n, 30)=1 and not issqr(n) and not isprime(n):
select(filter, [seq(i, i=3..1000, 2)]); # Robert Israel, May 30 2021
PROG
(PARI) { for(n=1, 600, if(!(isprime(n) || n%2==0 || n%3==0 || n%5==0 || issquare(n)), print1(n", ")))}
(PARI) is(n) = my(f=factor(n)); if(!issquare(n), f[1, 1]>5 && matsize(f)[1]>1, 0) \\ David A. Corneth, Jun 12 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
Dimitris Valianatos, Jun 12 2016
STATUS
approved