A229483 Squarefree numbers whose indices are lucky numbers.

1, 3, 10, 13, 19, 22, 33, 38, 47, 53, 59, 69, 78, 82, 102, 107, 110, 115, 119, 129, 141, 151, 161, 173, 182, 187, 206, 210, 215, 218, 227, 246, 258, 265, 274, 278, 309, 314, 318, 327, 334, 346, 359, 367, 382, 389, 391, 397, 426, 429, 437, 446, 462, 465, 470

Offset: 1

Author

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

Keywords

• nonn

Comments

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.

Crossrefs

Cf. A032605, A059987, A229205.

Formula

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