A103766 Primes equal to the sum of two integers squares, integers whose sum form prime(n) congruent to 1 (mod 4).

17, 97, 257, 641, 1297, 881, 2417

Offset

1,1

Links

Table of n, a(n) for n=1..7.

Example

a(1)=17 because 4^2+1^2=17 and 4+1=prime(3)=5;
a(2)=97 because 9^2+4^2=97 and 9+4=prime(6)=13;
a(3)=257 because 16^2+1^2=257 and 16+1=prime(7)=17.

Crossrefs

Sequence in context: A081593 A078901 A078902 * A165347 A008514 A152913

Adjacent sequences: A103763 A103764 A103765 * A103767 A103768 A103769

Keyword

easy,nonn

Author

Giovanni Teofilatto, Mar 29 2005

Status

approved