1,2

Originally arose as "Lucky numbers generated from squarefree numbers" under the hypothesis that Ulam's sieve (the one used to produce lucky numbers) ignores the values of the terms.

Table of n, a(n) for n=1..55.

a(n) = A005117(A000959(n)). - Charles R Greathouse IV, Sep 16 2013

Cf. A032605, A059987, A229205.

Sequence in context: A188373 A190776 A229205 * A235089 A022122 A042479

Adjacent sequences: A229480 A229481 A229482 * A229484 A229485 A229486

nonn

Charles R Greathouse IV and M. F. Hasler, Sep 24 2013

approved