OFFSET
1,2
EXAMPLE
For n=1 the polynomial P(1,t)=t+1 is irreducible in GF(2)[t]. For n=3 the polynomial P(3,t)=t^4(t+1)^3+1 = t^7+t^6+t^5+t^4+1 is irreducible in GF(2)[t].
PROG
(PARI) isok(n) = polisirreducible(Mod(1, 2)*(t^(2^(n-1))*(t+1)^(2^(n-1)-1)+1)); \\ Michel Marcus, Aug 14 2013
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Luis H. Gallardo, Jul 06 2009
STATUS
approved