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 1-5 of 5 results.

A108724 Numbers n such that 11*n + 17 is prime.

Original entry on oeis.org

0, 4, 6, 10, 12, 16, 24, 30, 40, 42, 46, 60, 66, 70, 72, 76, 82, 84, 94, 100, 112, 124, 130, 142, 144, 150, 156, 160, 174, 180, 186, 192, 202, 214, 216, 220, 222, 226, 234, 240, 250, 252, 256, 282, 286, 292, 294, 304, 312, 322, 324, 334, 342, 346, 352, 354, 364
Offset: 1

Views

Author

Parthasarathy Nambi, Jun 21 2005

Keywords

Examples

			If n=0, then 11*n + 17 = 17 (prime).
If n=42, then 11*n + 17 = 479 (prime).

Links

Crossrefs

Cf. A108233.

Programs

  • Maple
    a:=proc(n) if isprime(11*n+17)=true then n else fi end: seq(a(n),n=0..420); # Emeric Deutsch, Jun 26 2005
  • Mathematica
    Select[Range[0,500],PrimeQ[11#+17]&] (* Harvey P. Dale, Oct 16 2014 *)
  • PARI
    is(n)=isprime(11*n+17) \\ Charles R Greathouse IV, Jun 12 2017

Extensions

More terms from Emeric Deutsch, Jun 26 2005

A108725 Numbers n such that 11*n + 19 is prime.

Original entry on oeis.org

0, 2, 8, 12, 14, 20, 24, 30, 44, 48, 50, 54, 62, 72, 78, 90, 92, 98, 104, 110, 122, 128, 132, 134, 140, 150, 162, 164, 168, 170, 174, 180, 188, 192, 194, 212, 218, 230, 234, 240, 252, 258, 260, 272, 282, 288, 290, 294, 300, 308, 318, 320, 324, 332, 344, 348, 362
Offset: 1

Views

Author

Parthasarathy Nambi, Jun 21 2005

Keywords

Comments

All terms must be even. - Harvey P. Dale, Jan 05 2019

Examples

			If n=0, then 11*n + 19 = 19 (prime).
If n=48, then 11*n + 19 = 547 (prime).

Links

Crossrefs

Cf. A108233.
Cf. A017485, A141855.

Programs

  • Maple
    a:=proc(n) if isprime(11*n+19)=true then n else fi end: seq(a(n),n=0..400); # Emeric Deutsch, Jul 04 2005
  • Mathematica
    Select[Range[0,400,2],PrimeQ[ 11#+19]&] (* Harvey P. Dale, Jan 05 2019 *)
  • PARI
    is(n)=isprime(11*n+19) \\ Charles R Greathouse IV, Jun 13 2017

Extensions

More terms from Emeric Deutsch, Jul 04 2005

A108726 Numbers n such that 11*n + 29 is prime.

Original entry on oeis.org

0, 4, 10, 18, 22, 24, 28, 30, 42, 48, 52, 64, 72, 78, 84, 88, 90, 94, 100, 102, 108, 114, 118, 130, 132, 144, 148, 154, 160, 162, 168, 178, 184, 192, 198, 202, 204, 210, 214, 238, 244, 252, 270, 280, 298, 300, 304, 312, 318, 322, 324, 328, 330, 340, 354, 358
Offset: 1

Views

Author

Parthasarathy Nambi, Jun 21 2005

Keywords

Comments

Two less than the associated entry in A102711.

Examples

			If n=0, then 11*n + 29 = 29 (prime).
If n=48, then 11*n + 29 = 557 (prime).

Links

Crossrefs

Cf. A108233.

Programs

  • Maple
    a:=proc(n) if isprime(11*n+29)=true then n else fi end: seq(a(n),n=0..400); # Emeric Deutsch, Jun 26 2005
  • Mathematica
    Select[Range[0,400],PrimeQ[11#+29]&] (* Harvey P. Dale, Jan 26 2013 *)
  • PARI
    is(n)=isprime(11*n+29) \\ Charles R Greathouse IV, Jun 12 2017

Extensions

More terms from Emeric Deutsch, Jun 26 2005

A108727 Numbers n such that 11*n + 31 is prime.

Original entry on oeis.org

0, 2, 6, 12, 18, 20, 26, 32, 38, 56, 60, 66, 72, 80, 86, 90, 96, 98, 102, 116, 122, 128, 132, 138, 140, 146, 156, 168, 170, 180, 188, 192, 206, 210, 222, 228, 240, 242, 252, 266, 270, 272, 276, 278, 290, 300, 312, 318, 326, 336, 342, 350, 356, 362, 366, 368, 380
Offset: 1

Views

Author

Parthasarathy Nambi, Jun 21 2005

Keywords

Examples

			If n=0, then 11*n + 31 = 31 (prime).
If n=56, then 11*n + 31 = 647 (prime).

Links

Crossrefs

Cf. A108233.

Programs

  • Maple
    a:=proc(n) if isprime(11*n+31)=true then n else fi end: seq(a(n),n=0..450); # Emeric Deutsch, Jun 26 2005
  • Mathematica
    Select[Range[0,400],PrimeQ[11#+31]&] (* Harvey P. Dale, Nov 02 2011 *)
  • PARI
    is(n)=isprime(11*n+31) \\ Charles R Greathouse IV, Jun 13 2017

Extensions

More terms from Emeric Deutsch, Jun 26 2005

A153381 Numbers n such that 11*n+5 is not prime.

Original entry on oeis.org

1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 25, 26, 27, 29, 30, 31, 32, 33, 35, 37, 38, 39, 40, 41, 43, 44, 45, 46, 47, 48, 49, 50, 51, 53, 55, 56, 57, 59, 60, 61, 62, 63, 65, 66, 67, 68, 69, 70, 71, 73, 74, 75, 76, 77, 79, 80, 81, 83, 85, 86, 87, 88
Offset: 1

Views

Author

Vincenzo Librandi, Dec 25 2008

Keywords

Examples

			Distribution of the even terms in the following triangular array:
*;
*,*;
*,*,4;
2,*,*,*;
*,*,*,*,*;
*,*,*,*,*,*;
*,*,*,*,*,*,20;
*,*,*,*,*,*,*,*,;
*,*,*,*,*,22,*,*,*;
*,*,*,*,*,*,*,32,*,*;
*,10,*,*,*,*,*,*,*,*,*;
*,*,*,20,*,*,*,*,*,*,*,*;
*,*,*,*,*,*,*,*,*,*,56,*,*:
*,*,18,*,*,*,*,*,*,*,*,*,*,76;
8,*,*,*,*,*,*,*,*,*,*,70,*,*,*; etc.
where * marks the non-integer values of (4*h*k + 2*k + 2*h - 4)/11 with h >= k >= 1. - _Vincenzo Librandi_, Jan 17 2013

Links

Crossrefs

Cf. A108233.

Programs

  • Magma
    [n: n in [0..150] | not IsPrime(11*n+5)]; // Vincenzo Librandi, Jan 13 2013
  • Mathematica
    Select[Range[0, 200], !PrimeQ[11 # + 5] &] (* Vincenzo Librandi, Jan 13 2013 *)

Extensions

Erroneous comment deleted by N. J. A. Sloane, Jun 23 2010
Showing 1-5 of 5 results.

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