A208573 Smallest twin prime > 3*2^n.

11, 17, 29, 59, 101, 197, 419, 809, 1607, 3119, 6197, 12377, 24917, 49169, 98321, 196661, 393299, 786551, 1572869, 3145739, 6292007, 12582917, 25166129, 50331707, 100663427, 201327011, 402653411, 805306457, 1610613929, 3221225549

Offset

1,1

Links

Table of n, a(n) for n=1..30.

Example

For n=1 the smallest twin prime > 3*2^n is 11.

Mathematica

stp[n_]:=Module[{t=NextPrime[3*2^n]}, While[!PrimeQ[t+2], t=NextPrime[t]]; t]; Array[stp, 30] (* Harvey P. Dale, Sep 12 2015 *)

Crossrefs

Cf. A001359, A208574.

Sequence in context: A153502 A249377 A211486 * A142718 A258866 A189324

Adjacent sequences: A208570 A208571 A208572 * A208574 A208575 A208576

Keyword

nonn

Author

Washington Bomfim, Feb 28 2012

Status

approved