1,1

A004042(n) factorized with Dario Alpern's ECM;

a(n) = A051903(A004042(n)).

Dario A. Alpern, Factorization using the Elliptic Curve Method.

Eric Weisstein's World of Mathematics, Cyclic Number

A004042(1) = 142857 = 37*13*11*3^3, therefore a(1) = 3.

Cf. A001913, A087021.

Adjacent sequences: A087020 A087021 A087022 this_sequence A087024 A087025 A087026

Sequence in context: A117623 A139583 A073314 this_sequence A089214 A057038 A099871

nonn

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 30 2003