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 1-10 of 15 results. Next

A105126 Primes of the form 16n+9.

Original entry on oeis.org

41, 73, 89, 137, 233, 281, 313, 409, 457, 521, 569, 601, 617, 761, 809, 857, 937, 953, 1033, 1049, 1097, 1129, 1193, 1289, 1321, 1433, 1481, 1609, 1657, 1721, 1753, 1801, 1913, 1993, 2089, 2137, 2153, 2281, 2297, 2377, 2393, 2441, 2473, 2521, 2617, 2633, 2713
Offset: 1

Views

Author

N. J. A. Sloane, based on correspondence from Marco Matosic, Apr 11 2005

Keywords

Comments

A prime of the form 16n+9 is represented by exactly one of x^2 + 32y^2 and x^2 + 64y^2 (see Kaplanski link). - Michel Marcus, Dec 23 2012

Crossrefs

Programs

  • Maple
    M:=500; f:=proc(n) local t1,t2; t1:=[]; for k from 0 to M do t2:=2^n*k+2^(n-1)+1; if isprime(t2) then t1:=[op(t1),t2]; fi; od; t1; end; f(4);
  • Mathematica
    lst={};Do[p=16*n+9;If[PrimeQ[p],AppendTo[lst,p]],{n,0,3*5!,1}];lst (* Vladimir Joseph Stephan Orlovsky, Jan 27 2009 *)
  • PARI
    select(n->n%16==9, primes(500)) \\ Charles R Greathouse IV, Apr 29 2015

A105133 Numbers n such that 8n + 5 is prime.

Original entry on oeis.org

0, 1, 3, 4, 6, 7, 12, 13, 18, 19, 21, 22, 24, 28, 33, 34, 36, 39, 43, 46, 48, 49, 52, 57, 63, 67, 69, 76, 81, 82, 84, 87, 88, 91, 94, 96, 99, 102, 103, 106, 109, 117, 124, 126, 127, 132, 133, 136, 138, 139, 147, 151, 153, 154, 159, 162, 171, 172, 178, 181, 186, 193, 199, 201, 202
Offset: 1

Views

Author

N. J. A. Sloane, based on correspondence from Marco Matosic, Apr 11 2005

Keywords

Crossrefs

Programs

  • Magma
    [n: n in [0..500] | IsPrime(8*n+5)];  // Vincenzo Librandi, Jan 07 2013
    
  • Maple
    M:=500; f:=proc(n) local t1,t2; t1:=[]; for k from 0 to M do t2:=2^n*k+2^(n-1)+1; if isprime(t2) then t1:=[op(t1),k]; fi; od; t1; end; f(3);
  • Mathematica
    Select[Range[0, 300], PrimeQ[8 # + 5]&] (* Vincenzo Librandi, Jan 07 2013 *)
  • PARI
    is(n)=isprime(8*n+5) \\ Charles R Greathouse IV, Feb 17 2017

Formula

a(n) = (A007521(n)-5)/8. - Zak Seidov, Sep 08 2015

A105140 Numbers n such that 1024n+513 is prime.

Original entry on oeis.org

7, 10, 11, 17, 22, 25, 31, 35, 44, 50, 65, 74, 79, 82, 85, 94, 100, 109, 110, 112, 115, 116, 122, 130, 140, 149, 151, 154, 155, 157, 164, 166, 172, 179, 206, 211, 214, 215, 221, 227, 229, 232, 245, 254, 256, 259, 269, 271, 277, 280, 281, 292, 295, 296, 299, 316, 322, 332
Offset: 1

Views

Author

N. J. A. Sloane, based on correspondence from Marco Matosic, Apr 11 2005

Keywords

Crossrefs

Programs

A105131 Primes of the form 512n+257.

Original entry on oeis.org

257, 769, 3329, 7937, 9473, 14081, 14593, 22273, 23297, 26881, 30977, 31489, 36097, 37633, 40193, 41729, 43777, 46337, 49409, 49921, 57089, 57601, 60161, 70913, 75521, 77569, 78593, 84737, 88321, 91393, 96001, 98561, 100609, 103681, 106753, 107777
Offset: 1

Views

Author

N. J. A. Sloane, based on correspondence from Marco Matosic, Apr 11 2005

Keywords

Crossrefs

Programs

  • Magma
    [ a: n in [0..210] | IsPrime(a) where a is 512*n+257 ]; // Vincenzo Librandi, Jul 19 2012
  • Mathematica
    Select[Table[512*n+257,{n,0,800}],PrimeQ] (* Vincenzo Librandi, Jul 19 2012 *)

A105127 Primes of the form 32n+17.

Original entry on oeis.org

17, 113, 241, 337, 401, 433, 593, 881, 977, 1009, 1201, 1297, 1361, 1489, 1553, 1777, 1873, 2129, 2161, 2417, 2609, 2801, 2833, 2897, 3089, 3121, 3217, 3313, 3697, 3761, 3793, 3889, 4049, 4177, 4241, 4273, 4337, 4561, 4657, 4721, 4817, 5009, 5233, 5297
Offset: 1

Views

Author

N. J. A. Sloane, based on correspondence from Marco Matosic, Apr 11 2005

Keywords

Crossrefs

Programs

A105129 Primes of the form 128n+65.

Original entry on oeis.org

193, 449, 577, 1217, 1601, 2113, 2753, 3137, 4289, 4673, 4801, 5441, 5569, 5953, 6337, 6977, 7489, 7873, 8513, 8641, 9281, 10177, 10433, 11329, 11969, 12097, 13121, 13249, 13633, 14401, 14657, 15809, 15937, 16193, 17729, 19009, 19777, 20161, 20929, 21313
Offset: 1

Views

Author

N. J. A. Sloane, based on correspondence from Marco Matosic, Apr 11 2005

Keywords

Crossrefs

Programs

  • Magma
    [ a: n in [0..200] | IsPrime(a) where a is 128*n+65 ]; // Vincenzo Librandi, Jul 19 2012
  • Mathematica
    Select[128*Range[0,200]+65,PrimeQ] (* Harvey P. Dale, Apr 17 2012 *)
    Select[Table[128*n+65,{n,0,700}],PrimeQ] (* Vincenzo Librandi, Jul 19 2012 *)

A105128 Primes of the form 64n+33.

Original entry on oeis.org

97, 353, 673, 929, 1249, 1697, 1889, 2017, 2081, 2273, 2593, 2657, 3041, 3169, 3361, 3617, 4001, 4129, 4513, 5153, 5281, 5857, 6113, 6689, 7393, 7457, 7649, 7841, 8161, 8353, 8609, 8737, 8929, 9377, 9697, 10273, 10337, 10529, 10657, 11489, 11617, 11681
Offset: 1

Views

Author

N. J. A. Sloane, based on correspondence from Marco Matosic, Apr 11 2005

Keywords

Crossrefs

Programs

  • Magma
    [ a: n in [0..200] | IsPrime(a) where a is 64*n+33]; // Vincenzo Librandi, Jul 19 2012
  • Mathematica
    Select[Table[64*n+33,{n,0,700}],PrimeQ] (* Vincenzo Librandi, Jul 19 2012 *)

A105130 Primes of the form 256n+129.

Original entry on oeis.org

641, 1153, 1409, 2689, 3457, 4481, 4993, 6529, 7297, 9601, 9857, 10369, 11393, 12161, 13441, 13697, 15233, 16001, 18049, 19073, 19841, 20353, 21121, 21377, 26497, 28289, 29569, 30593, 31873, 33409, 35201, 35969, 38273, 39041, 40577, 43649, 44417, 45697
Offset: 1

Views

Author

N. J. A. Sloane, based on correspondence from Marco Matosic, Apr 11 2005

Keywords

Crossrefs

Programs

  • Magma
    [ a: n in [0..200] | IsPrime(a) where a is 256*n+129 ]; // Vincenzo Librandi, Jul 19 2012
  • Mathematica
    Select[Table[256*n+129,{n,0,700}],PrimeQ] (* Vincenzo Librandi, Jul 19 2012 *)

A105134 Numbers n such that 16n+9 is prime.

Original entry on oeis.org

2, 4, 5, 8, 14, 17, 19, 25, 28, 32, 35, 37, 38, 47, 50, 53, 58, 59, 64, 65, 68, 70, 74, 80, 82, 89, 92, 100, 103, 107, 109, 112, 119, 124, 130, 133, 134, 142, 143, 148, 149, 152, 154, 157, 163, 164, 169, 170, 173, 178, 184, 185, 187, 190, 200, 203, 214, 215, 220, 224, 229
Offset: 1

Views

Author

N. J. A. Sloane, based on correspondence from Marco Matosic, Apr 11 2005

Keywords

Crossrefs

Programs

A105138 Numbers n such that 256n+129 is prime.

Original entry on oeis.org

2, 4, 5, 10, 13, 17, 19, 25, 28, 37, 38, 40, 44, 47, 52, 53, 59, 62, 70, 74, 77, 79, 82, 83, 103, 110, 115, 119, 124, 130, 137, 140, 149, 152, 158, 170, 173, 178, 179, 193, 200, 205, 208, 209, 212, 217, 230, 235, 238, 242, 247, 248, 257, 268, 269, 272, 275, 280, 283, 299, 307
Offset: 1

Views

Author

N. J. A. Sloane, based on correspondence from Marco Matosic, Apr 11 2005

Keywords

Crossrefs

Programs

Showing 1-10 of 15 results. Next