z 20 + 19 z 18 + 152 z 16 + 666 z 14 + 1742 z 12 + 2782 z 10 + 2665 z 8 + 1443 z 6 + 390 z 4 + 40 z 2 + 1 {\displaystyle z^{20}+19z^{18}+152z^{16}+666z^{14}+1742z^{12}+2782z^{10}+2665z^{8}+1443z^{6}+390z^{4}+40z^{2}+1}
