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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.

A353409 Smallest overpseudoprime to base 2 (A141232) with n distinct prime factors.

Original entry on oeis.org

2047, 13421773, 14073748835533
Offset: 2

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Author

Daniel Suteu, May 07 2022

Keywords

Comments

a(5) > 2^64.
a(5) <= 1376414970248942474729,
a(6) <= 48663264978548104646392577273,
a(7) <= 294413417279041274238472403168164964689,
a(8) <= 98117433931341406381352476618801951316878459720486433149,
a(9) <= 1252977736815195675988249271013258909221812482895905512953752551821.

Crossrefs

Cf. A001567, A007011, A141232, A180065, A328665.

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