OFFSET
1,1
LINKS
Hugo Pfoertner, Table of n, a(n) for n = 1..10000
EXAMPLE
a(1)=8 because 8^4 + 1 = 4097 = 17*241;
a(2)=10: 10^4 + 1 = 10001 = 73*137.
MATHEMATICA
Select[Range[2, 300, 2], PrimeOmega[#^4+1]==2&] (* Harvey P. Dale, Dec 25 2021 *)
PROG
(PARI) isA096171(n) = {local(m); m=n^4+1; (m%2==1)&&(bigomega(m)==2)} \\ Michael B. Porter, Feb 02 2010
CROSSREFS
KEYWORD
nonn
AUTHOR
Hugo Pfoertner, Jun 19 2004
STATUS
approved