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%I #14 Dec 20 2021 08:11:48
%S 0,0,1,1,0,1,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,
%T 0,0,0,1,0,0,0,1,0,1,0,0,0,1,0,0,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,0,0,1,
%U 0,1,0,1,0,1,0,0,0,1,0,1,0,1,0,1,0,0,0,1,0,1,0,1,0,0,0,0,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,0,0,1,0,1,0,1,0,0,0,1,0,0,0,0,0,1,0
%N Characteristic function for A206074.
%H Antti Karttunen, <a href="/A257000/b257000.txt">Table of n, a(n) for n = 0..65537</a>
%t binPol[n_, x_] := With[{bb = IntegerDigits[n, 2]}, bb.x^Range[Length[bb]-1, 0, -1]];
%t a[n_] := If[IrreduciblePolynomialQ[binPol[n, x]], 1, 0];
%t a /@ Range[0, 128] (* _Jean-François Alcover_, Dec 20 2021 *)
%o (PARI)
%o A257000(n) = polisirreducible(Pol(binary(n)));
%o for(n=0, 8191, write("b257000.txt", n, " ", A257000(n)));
%Y Partial sums: A255574.
%Y Cf. A010051, A091225, A206074, A304751.
%K nonn
%O 0
%A _Antti Karttunen_, May 14 2015
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