OFFSET
1,2
FORMULA
a(n) = SQRT(A106562(n)).
EXAMPLE
a(3)=17 because the third square which is not the sum of two primes (289=17^2) is the 17th one in the succession of the perfect squares (thus: index 17).
CROSSREFS
KEYWORD
nonn
AUTHOR
Alexandre Wajnberg, May 09 2005
EXTENSIONS
Extended by Ray Chandler, May 12 2005
STATUS
approved