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.

A104081 Smallest prime >= 3^n.

Original entry on oeis.org

2, 3, 11, 29, 83, 251, 733, 2203, 6563, 19687, 59051, 177167, 531457, 1594331, 4782971, 14348909, 43046747, 129140197, 387420499, 1162261523, 3486784409, 10460353259, 31381059613, 94143178859, 282429536483, 847288609457
Offset: 0

Views

Author

Cino Hilliard, Mar 03 2005

Keywords

Links

Crossrefs

Cf. A104080 (for 2^n).
Cf. A104088 (largest prime <= 3^n).
Cf. A000244, A007918, A014211.

Programs

Formula

a(n) = A014211(n), n > 1. - R. J. Mathar, Dec 13 2008
a(n) = A007918(A000244(n)). - Michel Marcus, Nov 08 2018

A104089 Largest prime <= 4^n.

Original entry on oeis.org

3, 13, 61, 251, 1021, 4093, 16381, 65521, 262139, 1048573, 4194301, 16777213, 67108859, 268435399, 1073741789, 4294967291, 17179869143, 68719476731, 274877906899, 1099511627689, 4398046511093, 17592186044399, 70368744177643
Offset: 1

Views

Author

Cino Hilliard, Mar 03 2005

Keywords

Crossrefs

Cf. A014234, A104082, A104088, A104090-A104094, A003618, A104096.
Cf. A000040, A000302, A007917.

Programs

  • Mathematica
    NextPrime[4^Range[30], -1] (* Paolo Xausa, Oct 28 2024 *)
  • PARI
    g(n,b) = for(x=0,n,print1(precprime(b^x)","))

Formula

a(n) = A007917(A000302(n)). - Paolo Xausa, Oct 28 2024

A104090 Largest prime <= 5^n.

Original entry on oeis.org

5, 23, 113, 619, 3121, 15619, 78121, 390581, 1953109, 9765619, 48828113, 244140613, 1220703073, 6103515623, 30517578121, 152587890563, 762939453109, 3814697265523, 19073486328109, 95367431640599, 476837158203071, 2384185791015571, 11920928955078089
Offset: 1

Views

Author

Cino Hilliard, Mar 03 2005

Keywords

Crossrefs

Cf. A014234, A054321, A104088, A104089, A104091-A104094, A003618, A104096.
Cf. A000040, A000351, A007917.

Programs

  • Mathematica
    NextPrime[5^Range[30] + 1, -1] (* Paolo Xausa, Oct 29 2024 *)
  • PARI
    g(n,b) = for(x=0,n,print1(precprime(b^x)","))

Formula

a(n) = A007917(A000351(n)). - Paolo Xausa, Oct 29 2024
Showing 1-3 of 3 results.

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

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