1,1

Table of n, a(n) for n=1..25.

a(2)=857: 857 and 859 are twin primes. (857^2+1)^2+1 = 539416802501. 539416802501 and 539416802503 are also twin primes.

Cf. A093245.

Sequence in context: A252762 A341574 A283017 * A163430 A203688 A253578

Adjacent sequences: A093186 A093187 A093188 * A093190 A093191 A093192

nonn

Ray G. Opao, May 11 2004

approved