A374150 a(n) is the (2^n)-th prime-indexed prime.
3, 5, 17, 67, 241, 739, 2063, 5441, 13693, 34351, 83617, 198479, 465337, 1076401, 2461873, 5582917, 12548171, 28018649, 62133769, 137034913, 300736621, 656953343, 1429360349, 3098240417, 6692967079, 14414137427, 30952936639, 66293412113, 141636592337, 301924957273
Offset: 0
Keywords
Examples
a(0) = 3 since prime(prime(2^0)) = prime(prime(1)) = prime(2) = 3. a(1) = 5 since prime(prime(2^1)) = prime(prime(2)) = prime(3) = 5.
Links
- Amiram Eldar, Table of n, a(n) for n = 0..52
- Kim Walisch, Fast C++ prime counting function implementation (primecount).
- Wikipedia, Super-prime.
Programs
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Mathematica
Table[Prime[Prime[2^n]], {n, 0, 30}] -
PARI
a(n) = prime(prime(2^n));
Comments