OFFSET
1,1
COMMENTS
Primes of the sequence A224718 generating squarefree.
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
EXAMPLE
23 is a term since 23^2+1 = 530 = 2*5*53, is squarefree.
43 is not a term since 43^2+1 = 1850 = 2*5^2*7, is not squarefree.
MATHEMATICA
Select[Prime[Range[100]], SquareFreeQ[#^2+1]&]
CROSSREFS
KEYWORD
nonn
AUTHOR
Rafael Parra Machio, May 18 2013
STATUS
approved