1,1
Dario Alpern, Factorization using the Elliptic Curve Method
a(1)=65 because 3^4-2^4=65=5*13 is a semiprime. a(3)=19171: 3^9-2^9=19171=19*1009.
Cf. A082869 = n such that 3^n-2^n is a semiprime, A058765 primes of the form 3^n-2^n.
Sequence in context: A183271 A197088 A002502 * A017781 A017728 A004354
Adjacent sequences: A095024 A095025 A095026 * A095028 A095029 A095030
nonn
Hugo Pfoertner (hugo(AT)pfoertner.org), Jun 03 2004
