A119772 a(n) = prime(4^n).

2, 7, 53, 311, 1619, 8161, 38873, 180503, 821641, 3681131, 16290047, 71378569, 310248241, 1339484197, 5750079047, 24563311309, 104484802057, 442795487221, 1870358526653, 7877263558621, 33089240375501, 138666449011757, 579863159340527, 2420094683001859, 10082409897709157

Offset: 0

Author

Jim Snow (jsnow(AT)mitre.org), Jun 22 2006

Keywords

• nonn
• hard

Links

• Amiram Eldar, Table of n, a(n) for n = 0..39 (calculated from the b-file at A033844; terms 0..28 from Charles R Greathouse IV, a(26) corrected)
• Andrew Booker, The Nth Prime Page.

Crossrefs

Cf. A033844.

Programs

Mathematica

Prime[4^Range[0,20]] (* Harvey P. Dale, Jul 12 2011 *)

PARI

a(n)=prime(4^n) \\ Charles R Greathouse IV, Nov 02 2014

Formula

a(n) = A033844(2*n). - Amiram Eldar, Jun 06 2024

Extensions

a(20)-a(24) from Charles R Greathouse IV, Nov 02 2014