1,1

Table of n, a(n) for n=1..56.

a(n) = sqrt(A106573(n)).

a(2)=17 because the second square which is nor the sum nor the difference of two primes (289=17^2) is the 17th one in the succession of the perfect squares (thus: index 17).

Cf. A106544-A106548, A106562-A106564, A106571, A106573-A106575, A106577.

Sequence in context: A190039 A066074 A106563 * A171125 A156781 A175888

Adjacent sequences: A106571 A106572 A106573 * A106575 A106576 A106577

easy,nonn

Alexandre Wajnberg, May 09 2005

Corrected and extended by Ray Chandler, May 12 2005

approved