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 1-4 of 4 results.

A135659 a(n) = 24*n + 7.

Original entry on oeis.org

7, 31, 55, 79, 103, 127, 151, 175, 199, 223, 247, 271, 295, 319, 343, 367, 391, 415, 439, 463, 487, 511, 535, 559, 583, 607, 631, 655, 679, 703, 727, 751, 775, 799, 823, 847, 871, 895, 919, 943, 967, 991, 1015, 1039, 1063, 1087, 1111, 1135, 1159, 1183, 1207
Offset: 0

Views

Author

Artur Jasinski, Nov 25 2007

Keywords

Comments

Conjecture: All Mersenne Primes (A000668) > 3 are in this sequence.

Crossrefs

Programs

  • Mathematica
    Table[24n + 7, {n, 0, 100}]
    LinearRecurrence[{2,-1},{7,31},60] (* Harvey P. Dale, Jul 14 2013 *)

Formula

From Colin Barker, Apr 02 2012: (Start)
a(n) = 2*a(n-1) - a(n-2).
G.f.: (7+17*x)/(1-x)^2. (End)
E.g.f.: (7 + 24*x)*exp(x). - G. C. Greubel, Oct 25 2016

Extensions

Offset changed to 0 by Omar E. Pol, Oct 25 2016

A135983 a(n)=2^A107006(n)-1.

Original entry on oeis.org

127, 2147483647, 604462909807314587353087, 10141204801825835211973625643007, 170141183460469231731687303715884105727, 2854495385411919762116571938898990272765493247
Offset: 1

Views

Author

Artur Jasinski, Dec 09 2007

Keywords

Comments

A107006(n) are successive primes of the form 24n+7.

Crossrefs

Programs

  • Mathematica
    p = Select[24*Range[0, 20] + 7, PrimeQ]; 2^p - 1

A135984 a(n) = 24(prime(n))+7.

Original entry on oeis.org

55, 79, 127, 175, 271, 319, 415, 463, 559, 703, 751, 895, 991, 1039, 1135, 1279, 1423, 1471, 1615, 1711, 1759, 1903, 1999, 2143, 2335, 2431, 2479, 2575, 2623, 2719, 3055, 3151, 3295, 3343, 3583, 3631, 3775, 3919, 4015, 4159, 4303, 4351, 4591, 4639, 4735
Offset: 1

Views

Author

Artur Jasinski, Dec 09 2007

Keywords

Crossrefs

Programs

  • Mathematica
    Table[24*Prime[n] + 7, {n, 1, 100}]

A135985 Prime numbers of the form 24*p + 7 where p is prime.

Original entry on oeis.org

79, 127, 271, 463, 751, 991, 1039, 1279, 1423, 1471, 1759, 1999, 2143, 2719, 3343, 3583, 3631, 3919, 4159, 4591, 4639, 4783, 5503, 5743, 5791, 7039, 7951, 8623, 9103, 9199, 9343, 9631, 10111, 10399, 10639, 11071, 11119, 11503, 12511
Offset: 1

Views

Author

Artur Jasinski, Dec 09 2007

Keywords

Crossrefs

Programs

  • Maple
    select(t -> isprime(t) and isprime((t-7)/24), [seq(p,p=7..20000,24)]); # Robert Israel, Oct 16 2018
  • Mathematica
    a = {}; Do[If[PrimeQ[24(Prime[n]) + 7], AppendTo[a, 24(Prime[n]) + 7]], {n, 1, 100}]; a
Showing 1-4 of 4 results.