OFFSET
1,1
COMMENTS
A002471(a(n))>0; complement of A014090; A143989 is a subsequence. [From Reinhard Zumkeller, Sep 07 2008]
PROG
(PARI) isok(n) = for (i = 0, sqrtint(n), if (isprime(n - i^2), return (1))); 0 \\ Michel Marcus, Sep 04 2013
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved