A267014 Primes of the form a^a + a*b + b^b.

2, 3, 5, 7, 23, 31, 37, 251, 257, 3119, 3167, 46649, 46663, 49811, 823591, 870241, 16780381, 387420479, 387420499, 285311717333, 11414881932150451, 18446744359021222403, 827240261886336764159, 827240261886336767387, 827240261886337587839, 827240261896336764347

Offset

1,1

Comments

A161471 and A161472 are obvious subsequences.

Links

Table of n, a(n) for n=1..26.

Example

23 is a term because 3^3 + 3*(-1) + (-1)^(-1) = 23 is prime.
31 is a term because 3^3 + 3*1 + 1^1 = 31 is prime.
37 is a term because 3^3 + 3*2 + 2^2 = 37 is prime.

Crossrefs

Cf. A068145, A161471, A161472.

Sequence in context: A235144 A235126 A309248 * A113611 A038925 A154761

Adjacent sequences: A267011 A267012 A267013 * A267015 A267016 A267017

Keyword

nonn

Author

Altug Alkan, Jan 08 2016

Status

approved