

A090874


a(n) is the smallest number m such that m^2^k + (m+1)^2^k is prime for k=0,1,...,n.


2




OFFSET

0,6


COMMENTS

The first five terms of this sequence correspond to Fermat primes.


LINKS

Table of n, a(n) for n=0..5.


EXAMPLE

a(5)=1806390369 because 1806390369 is the smallest number m such that
m^2^k+(m+1)^2^k is prime for k=0,1,2,3,4 and 5.


CROSSREFS

Cf. A090872, A090873, A019434, A000215.
Sequence in context: A129616 A105006 A318788 * A071371 A052094 A256123
Adjacent sequences: A090871 A090872 A090873 * A090875 A090876 A090877


KEYWORD

nonn


AUTHOR

Farideh Firoozbakht, Feb 06 2004


STATUS

approved



