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.

Previous Showing 11-16 of 16 results.

A105135 Numbers n such that 32n+17 is prime.

Original entry on oeis.org

0, 3, 7, 10, 12, 13, 18, 27, 30, 31, 37, 40, 42, 46, 48, 55, 58, 66, 67, 75, 81, 87, 88, 90, 96, 97, 100, 103, 115, 117, 118, 121, 126, 130, 132, 133, 135, 142, 145, 147, 150, 156, 163, 165, 168, 172, 195, 198, 201, 202, 205, 208, 210, 213, 217, 220, 222, 235, 243, 250, 252
Offset: 1

Views

Author

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

Keywords

Crossrefs

Programs

A105136 Numbers n such that 64n+33 is prime.

Original entry on oeis.org

1, 5, 10, 14, 19, 26, 29, 31, 32, 35, 40, 41, 47, 49, 52, 56, 62, 64, 70, 80, 82, 91, 95, 104, 115, 116, 119, 122, 127, 130, 134, 136, 139, 146, 151, 160, 161, 164, 166, 179, 181, 182, 196, 197, 206, 211, 214, 217, 221, 224, 227, 230, 235, 236, 239, 244, 250, 251, 256, 257
Offset: 1

Views

Author

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

Keywords

Crossrefs

Programs

A105137 Numbers n such that 128n+65 is prime.

Original entry on oeis.org

1, 3, 4, 9, 12, 16, 21, 24, 33, 36, 37, 42, 43, 46, 49, 54, 58, 61, 66, 67, 72, 79, 81, 88, 93, 94, 102, 103, 106, 112, 114, 123, 124, 126, 138, 148, 154, 157, 163, 166, 168, 177, 186, 187, 196, 198, 199, 201, 204, 207, 211, 213, 214, 219, 231, 232, 238, 252, 256, 262, 264
Offset: 1

Views

Author

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

Keywords

Crossrefs

Programs

A123980 Numbers k for which 8*k+1, 8*k+5 and 8*k+7 are primes.

Original entry on oeis.org

12, 24, 57, 162, 234, 249, 267, 297, 432, 519, 564, 717, 969, 984, 1167, 1179, 1389, 1734, 2007, 2364, 2427, 2544, 2664, 2769, 2784, 3582, 3627, 3819, 3897, 4089, 4287, 5244, 5307, 5337, 5472, 5577, 5667, 5727, 5967, 6084, 6102, 6399, 6522, 6822, 6987
Offset: 1

Views

Author

Artur Jasinski, Oct 30 2006

Keywords

Crossrefs

Programs

  • Mathematica
    Select[Range[7000], And @@ PrimeQ /@ ({1, 5, 7} + 8#) &] (* Ray Chandler, Nov 05 2006 *)

Extensions

Extended by Ray Chandler, Nov 05 2006

A123983 Numbers k for which 8*k+1, 8*k+5, 8*k+7 and 8*k+11 are primes.

Original entry on oeis.org

12, 57, 162, 249, 432, 564, 984, 1734, 2007, 2427, 2664, 2784, 3627, 5307, 5472, 5727, 6399, 7614, 11082, 11547, 11607, 11694, 14127, 14274, 14484, 14862, 15117, 17049, 19104, 19422, 20577, 25677, 27612, 27714, 28152, 29307, 32232, 34602, 35592
Offset: 1

Views

Author

Artur Jasinski, Oct 30 2006

Keywords

Crossrefs

Programs

  • Maple
    isA123983 := proc(n) RETURN( isprime(8*n+1) and isprime(8*n+5) and isprime(8*n+7) and isprime(8*n+11) ) ; end: for n from 1 to 7000 do if isA123983(n) then printf("%d,",n) ; fi ; od ; # R. J. Mathar, Nov 06 2006
  • Mathematica
    Select[Range[37000], And @@ PrimeQ /@ ({1, 5, 7, 11} + 8#) &] (* Ray Chandler, Nov 05 2006 *)

Extensions

Edited and extended by Ray Chandler and R. J. Mathar, Nov 05 2006

A153129 Numbers n such that 8*n + 5 is not prime.

Original entry on oeis.org

2, 5, 8, 9, 10, 11, 14, 15, 16, 17, 20, 23, 25, 26, 27, 29, 30, 31, 32, 35, 37, 38, 40, 41, 42, 44, 45, 47, 50, 51, 53, 54, 55, 56, 58, 59, 60, 61, 62, 64, 65, 66, 68, 70, 71, 72, 73, 74, 75, 77, 78, 79, 80, 83, 85, 86, 89, 90, 92, 93, 95, 97, 98, 100
Offset: 1

Views

Author

Vincenzo Librandi, Dec 19 2008

Keywords

Examples

			*;
*, *;
2, *, *;
*, 5, *, *;
*, *, 9, *, *;
*, *, *, 14, *, *;
5, *, *, *, 20, *, *;
*, 10, *, *, *, 27, *, *;
*, *, 16, *, *, *, 35, *, *;
where * marks the non-integer values of (2*n*k + k + n - 2)/4 with n >= k >= 1. - _Vincenzo Librandi_, Nov 30 2012
		

Crossrefs

Cf. A105133.

Programs

  • Magma
    [n: n in [1..120] | not IsPrime(8*n + 5)]; // Vincenzo Librandi, Nov 30 2012
  • Mathematica
    Select[Range[200], !PrimeQ[8# + 5] &] (* Vincenzo Librandi, Nov 30 2012 *)
Previous Showing 11-16 of 16 results.