

A257592


Number of zeros of the polynomial Sum_{j=0..n1} z^(2^j1)inside the unit circle.


1



1, 3, 5, 7, 17, 27, 51, 91, 183, 309, 617, 1125, 2097, 3995
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OFFSET

3,2


LINKS



MATHEMATICA

Table[Length[Select[Flatten[Abs[z/.NSolve[Sum[z^(2^j1), {j, 0, n1}]==0]]], #<1&]], {n, 3, 12}] (* Vaclav Kotesovec, May 17 2015, but for bigger n needs much memory (for n=14, 5 GB RAM) *)


CROSSREFS



KEYWORD

nonn,more


AUTHOR



STATUS

approved



