A344516 Numbers k such that (2^k-5, 2^k-3) are twin primes.

3, 4, 6, 10, 12, 20, 150

Offset

1,1

Comments

No more terms <= A050414(66) = 2086750.

Links

Table of n, a(n) for n=1..7.

G. L. Honaker, Jr. and Chris K. Caldwell, Prime Curios! 150.

Example

3 is a term since (2^3-5, 2^3-3) = (3, 5) are twin primes.

Mathematica

Select[Range[150], And @@ PrimeQ[2^# - {3, 5}] &]

Crossrefs

Intersection of A050414 and A059608.

Cf. A001097.

Sequence in context: A249666 A113887 A103000 * A310001 A310002 A240577

Adjacent sequences: A344513 A344514 A344515 * A344517 A344518 A344519

Keyword

nonn,more,hard

Author

Amiram Eldar, May 21 2021

Status

approved