|
|
A090874
|
|
a(n) is the smallest number m such that m^2^k + (m+1)^2^k is prime for k=0..n.
|
|
3
|
|
|
|
OFFSET
|
0,6
|
|
COMMENTS
|
The first five terms of this sequence correspond to Fermat primes.
|
|
LINKS
|
|
|
EXAMPLE
|
a(5)=1806390369 because this 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
|
|
|
KEYWORD
|
nonn,hard,more
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|