A088918 Number of representations of n as sum of two squares of distinct primes.

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0

Offset: 1

Author

Reinhard Zumkeller, Oct 23 2003

Keywords

• nonn

Comments

a(n) <= A000161(n); a(A088909(n)) > 0;

a(A088919(n)) = n and a(k) <> n for k < A088919(n).

Examples

			a(410)=2, see A088919.
		

Links

• Index entries for sequences related to sums of squares

Crossrefs

Cf. A002654.