cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A166104 Natural numbers whose prime factors are all congruent to 3 or 5 mod 6 (i.e., are in the sequence A045410).

Original entry on oeis.org

1, 3, 5, 9, 11, 15, 17, 23, 25, 27, 29, 33, 41, 45, 47, 51, 53, 55, 59, 69, 71, 75, 81, 83, 85, 87, 89, 99, 101, 107, 113, 115, 121, 123, 125, 131, 135, 137, 141, 145, 149, 153, 159, 165, 167, 173, 177, 179, 187, 191, 197, 205, 207, 213, 225, 227, 233, 235, 239
Offset: 1

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Author

Antti Karttunen, Oct 13 2009

Keywords

Comments

1 is included, as it has no prime factors at all, thus no prime factors outside of A045410.

Crossrefs

See the conjecture at A166103. Cf. A045410.