OFFSET
1,2
COMMENTS
Complement of A206284.
EXAMPLE
(See the example at A206284.)
MATHEMATICA
b[n_] := Table[x^k, {k, 0, n}];
f[n_] := f[n] = FactorInteger[n]; z = 400;
t[n_, m_, k_] := If[PrimeQ[f[n][[m, 1]]] && f[n][[m, 1]]
== Prime[k], f[n][[m, 2]], 0];
u = Table[Apply[Plus,
Table[Table[t[n, m, k], {k, 1, PrimePi[n]}], {m, 1,
Length[f[n]]}]], {n, 1, z}];
p[n_, x_] := u[[n]].b[-1 + Length[u[[n]]]]
Table[p[n, x], {n, 1, z/4}]
v = {}; Do[n++; If[IrreduciblePolynomialQ[p[n, x]],
AppendTo[v, n]], {n, z/2}]; v (* A206284 *)
Complement[Range[200], v] (* A206285 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Feb 05 2012
STATUS
approved