OFFSET
1,1
LINKS
Seiichi Manyama, Table of n, a(n) for n = 1..10000
EXAMPLE
48 = 2^4*3, 49 = 7^2 and 50 = 2*5^2. So 47 is a term.
98 = 2*7^2, 99 = 3^2*11 and 100 = 2^2*5^2. So 97 is a term.
PROG
(PARI) forprime(p=2, 1e5, if(!issquarefree(p+1) && !issquarefree(p+2) && !issquarefree(p+3), print1(p", ")))
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Sep 08 2018
STATUS
approved