0,5

Table of n, a(n) for n=0..90.

a(n) = 0 if n is a cube other than 1.

(PARI) for(n=0, 90, a=sum(k=0, n, isprime(k^3+n^2)); print1(a", "))

Cf. A066649.

Sequence in context: A118404 A089339 A249303 * A336931 A182662 A308778

Adjacent sequences: A319078 A319079 A319080 * A319082 A319083 A319084

nonn

Gionata Neri, Sep 09 2018

approved