A103911 Numbers n such that 2*P(n)+1, 2*P(n+1)+1, 2*P(n+2)+3, 2*P(n+3)+3 are also consecutive primes with P(i)=i-th prime.

34771, 219423, 507698, 776248, 920369, 1655143, 1820948, 1847083, 1883839, 2179339, 2747429, 2979743, 3075306, 3516977, 3579987, 3905386, 3991750, 4167882, 5183712

Offset

1,1

Links

Table of n, a(n) for n=1..19.

Mathematica

cpQ[n_]:=Module[{a=2Prime[n]+1, b=2Prime[n+1]+1, c=2Prime[n+2]+3, d= 2Prime[ n+3]+3}, PrimeQ[ a]&&NextPrime[a]==b&&NextPrime[b]==c&&NextPrime[c]==d]; Select[Range[5200000], cpQ] (* Harvey P. Dale, Mar 08 2014 *)

Crossrefs

Cf. A103912 A103913.

Sequence in context: A259009 A256900 A236141 * A185472 A116016 A253117

Adjacent sequences: A103908 A103909 A103910 * A103912 A103913 A103914

Keyword

nonn

Author

Pierre CAMI, Feb 21 2005

Extensions

Corrected by Harvey P. Dale, Mar 08 2014

Status

approved