OFFSET
1,1
FORMULA
a(n)=p=x^2+y^3; q=x^2-y3;r=x^3+y^2;s=x^3-y^2 ; x > y ; a(n),q,r,s are prime numbers.
EXAMPLE
p=a(1)= 127 because:
P=127=10^2+3^3=100+27;
q=73=10^2-3^3=100-27;
r=1009=10^3+3^2=1000+9;
s=991=10^3-3^2=1000-9
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Tomas Xordan, May 29 2007
STATUS
approved