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.

A141928 Primes congruent to 2 mod 25.

Original entry on oeis.org

2, 127, 227, 277, 577, 677, 727, 827, 877, 977, 1277, 1327, 1427, 1627, 1777, 1877, 2027, 2377, 2477, 2677, 2777, 2927, 3527, 3677, 3727, 3877, 4027, 4127, 4177, 4327, 4877, 5077, 5227, 5477, 5527, 5827, 5927, 6277, 6427, 6577, 6827, 6977, 7027, 7127, 7177
Offset: 1

Views

Author

N. J. A. Sloane, Jul 11 2008

Keywords

Crossrefs

Programs

Formula

{2} UNION A142466. - R. J. Mathar, Jul 20 2008
a(n) ~ 20n log n. - Charles R Greathouse IV, Jul 03 2016

A244767 Prime numbers ending in the prime number 29.

Original entry on oeis.org

29, 229, 829, 929, 1129, 1229, 1429, 2029, 2129, 2729, 3229, 3329, 3529, 3929, 4129, 4229, 4729, 6029, 6229, 6329, 6529, 6829, 7129, 7229, 7529, 7829, 8329, 8429, 8629, 8929, 9029, 9629, 9829, 9929, 10429, 10529, 10729, 11329, 12329, 12829, 13229, 13729
Offset: 1

Views

Author

Vincenzo Librandi, Jul 06 2014

Keywords

Comments

Also primes of the form 100*n+29. Subsequence of A141883, A141930.

Crossrefs

Cf. similar sequences listed in A244763.

Programs

  • Magma
    [n: n in PrimesUpTo(16000) | n mod 100 eq 29];
    
  • Mathematica
    Select[Prime[Range[5, 6000]], Take[IntegerDigits[#], -2]=={2, 9} &]
    Select[Prime[Range[6000]],Mod[#,100]==29&] (* Harvey P. Dale, Oct 05 2021 *)
  • PARI
    select(x->(x % 100)==29, primes(2000)) \\ Michel Marcus, Jul 06 2014

A244775 Prime numbers ending in the prime number 79.

Original entry on oeis.org

79, 179, 379, 479, 1279, 1579, 1879, 1979, 2179, 2579, 2879, 3079, 3779, 4079, 4679, 5179, 5279, 5479, 5779, 5879, 6079, 6379, 6679, 6779, 7079, 7879, 8179, 8779, 9479, 9679, 10079, 10979, 11279, 11579, 11779, 12379, 12479, 12979, 13679, 13879
Offset: 1

Views

Author

Vincenzo Librandi, Jul 07 2014

Keywords

Comments

Also primes of the form 100*n+79. Subsequence of A141887, A141930.

Crossrefs

Cf. similar sequences listed in A244763.

Programs

  • Magma
    [n: n in PrimesUpTo(14000) | n mod 100 eq 79];
    
  • Mathematica
    Select[Prime[Range[5, 6000]], Take[IntegerDigits[#], -2]=={7, 9} &]
    Select[Prime[Range[2000]],Mod[#,100]==79&] (* Harvey P. Dale, Nov 29 2017 *)
  • PARI
    select(x->(x % 100)==79, primes(2000)) \\ Michel Marcus, Jul 07 2014
Showing 1-3 of 3 results.