OFFSET
1,1
COMMENTS
For even n > 4 = 2m, x^(2m) - y^(2m-2) = (x^m)^2 - y^((m-1))^2 is divisible by x^m - y^(m-1) which is not prime. This accounts for the omission of even powers in the definition.
CROSSREFS
KEYWORD
nonn
AUTHOR
Cino Hilliard, Jun 17 2009
EXTENSIONS
Incorrect program removed; definition confined to odd powers; added terms a(8)..a(11). - R. J. Mathar, Feb 27 2012
STATUS
approved