z 14 + 13 z 12 + 66 z 10 + 165 z 8 + 210 z 6 + 126 z 4 + 28 z 2 + 1 {\displaystyle z^{14}+13z^{12}+66z^{10}+165z^{8}+210z^{6}+126z^{4}+28z^{2}+1}
