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.

A270998 Table read by rows: list of prime 5-tuples of the form (p, p+2, p+6, p+8, p+12).

Original entry on oeis.org

5, 7, 11, 13, 17, 11, 13, 17, 19, 23, 101, 103, 107, 109, 113, 1481, 1483, 1487, 1489, 1493, 16061, 16063, 16067, 16069, 16073, 19421, 19423, 19427, 19429, 19433, 21011, 21013, 21017, 21019, 21023, 22271, 22273, 22277, 22279, 22283, 43781, 43783, 43787, 43789, 43793
Offset: 1

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Author

Arkadiusz Wesolowski, Jul 12 2016

Keywords

Comments

A prime 5-tuple is a constellation of five successive primes with distance 12, and is of the form (p, p+2, p+6, p+8, p+12) or (p, p+4, p+6, p+10, p+12).
Initial members p (other than 5) of prime 5-tuples of the form (p, p+2, p+6, p+8, p+12) are congruent to 11 or 101 (mod 210).
Also called prime 5-tuples of the first kind.

Crossrefs

Programs

  • Magma
    lst:=[]; for p in [5..43781 by 2] do if p eq 5 xor p mod 210 in {11, 101} then if IsPrime(p) then t:=[c: c in [p+2..p+12] | IsPrime(c)]; if #t eq 4 then lst:=lst cat [p] cat t; end if; end if; end if; end for; lst;
  • Mathematica
    m = {0, 2, 6, 8, 12}; Union@ Flatten@ Map[# + m &, Select[Prime@ Range[10^4], Times @@ Boole@ PrimeQ[# + m] == 1 &]] (* Michael De Vlieger, Jul 13 2016 *)
    Select[Partition[Prime[Range[5000]],5,1],Differences[#]=={2,4,2,4}&]// Flatten (* Harvey P. Dale, Jul 27 2020 *)

Formula

a(5*n-4) = A022006(n).