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 1-2 of 2 results.

A154548 Averages of twin prime pairs of A154546.

Original entry on oeis.org

60, 72, 180, 282, 312, 420, 432, 462, 570, 642, 810, 1062, 1452, 1620, 2130, 2592, 3252, 3360, 3540, 4050, 4650, 4800, 5640, 5742, 5850, 6090, 6360, 6552, 6792, 7332, 7350, 7560, 7590, 8292, 9042, 9462, 10140, 10530, 10860, 11070, 11172, 11940
Offset: 1

Views

Author

Vladimir Joseph Stephan Orlovsky, Jan 11 2009

Keywords

Crossrefs

Cf. A154276, A154546, A154547

Programs

  • Mathematica
    lst={};Do[If[PrimeQ[p=81*n^2-72*n+17],If[PrimeQ[n-1]&&PrimeQ[n+1],AppendTo[lst,n]]],{n,0,8!}];lst

A154547 Sophie Germain primes of A154276.

Original entry on oeis.org

902501, 10824101, 19096901, 26832401, 40322501, 166926401, 255360401, 309760001, 335622401, 338928101, 404814401, 412090001, 430562501, 441840401, 651270401, 702780101, 885062501, 1006792901, 1029768101, 1160764901
Offset: 1

Views

Author

Vladimir Joseph Stephan Orlovsky, Jan 11 2009

Keywords

Crossrefs

Cf. A154276, A154546

Programs

  • Mathematica
    lst={};Do[If[PrimeQ[p=81*n^2-72*n+17],If[PrimeQ[2*p+1],AppendTo[lst,p]]],{n,8!}];lst
Showing 1-2 of 2 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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