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.

Showing 1-3 of 3 results.

A062589 Numbers k such that 23^k - 22^k is prime, or a strong pseudoprime.

Original entry on oeis.org

229, 241, 673, 5387, 47581
Offset: 1

Views

Author

Mike Oakes, May 18 2001, May 19 2001

Keywords

Comments

Terms greater than 1000 often correspond to "unproven" strong pseudoprimes.
a(6) > 10^5. - Robert Price, Aug 22 2012

Crossrefs

Cf. A000043, A057468, A059801, A059802, A062572-A062588, A214658, A214655, A062592-A062666.

Extensions

a(5) from Robert Price, Aug 22 2012
Edited by M. F. Hasler, Sep 21 2013

A062592 Numbers k such that 26^k - 25^k is prime or a strong pseudoprime.

Original entry on oeis.org

3, 7, 97, 109, 401, 431
Offset: 1

Views

Author

Mike Oakes, May 18 2001, May 19 2001

Keywords

Comments

a(7) > 10^5. - Robert Price, Nov 10 2012

Crossrefs

Cf. A000043, A057468, A059801, A059802, A062572-A062589, A214658, A214655, A062593-A062666.

Extensions

Edited by M. F. Hasler, Sep 21 2013

A214658 Numbers n such that 24^n - 23^n is prime or a strong pseudoprime.

Original entry on oeis.org

2, 3, 31, 40519, 51061
Offset: 1

Views

Author

Robert Price, Jul 24 2012

Keywords

Comments

All terms are prime.
No other terms less than 10^5. - Robert Price, Jul 24 2012

Crossrefs

Cf. A000043, A057468, A059801, A059802, A059803, A062572-A062589, A214655, A062592-A062666.

Programs

  • Mathematica
    Select[Range[10^5], PrimeQ[24^#-23^# ]&]
Showing 1-3 of 3 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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