2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
1 cos(3) cos (3) cos (3) cos (3) cos (3) cos (3) cos (3) cos (3) cos (3) cos (3) cos (3) cos (3) cos (3) cos (3) cos (3) cos (3) cos (3) cos (3) cos (3) cos (3)
- + ------ + ------- + ------- + ------- + ------- + ------- + ------- + ------- + ------- + -------- + -------- + -------- + -------- + -------- + -------- + -------- + -------- + -------- + -------- + --------
2 3 5 9 17 33 65 129 257 513 1025 2049 4097 8193 16385 32769 65537 131073 262145 524289 1048577
$$\frac{\cos{\left(3 \right)}}{3} + \frac{\cos^{3}{\left(3 \right)}}{9} + \frac{\cos^{5}{\left(3 \right)}}{33} + \frac{\cos^{7}{\left(3 \right)}}{129} + \frac{\cos^{9}{\left(3 \right)}}{513} + \frac{\cos^{11}{\left(3 \right)}}{2049} + \frac{\cos^{13}{\left(3 \right)}}{8193} + \frac{\cos^{15}{\left(3 \right)}}{32769} + \frac{\cos^{17}{\left(3 \right)}}{131073} + \frac{\cos^{19}{\left(3 \right)}}{524289} + \frac{\cos^{20}{\left(3 \right)}}{1048577} + \frac{\cos^{18}{\left(3 \right)}}{262145} + \frac{\cos^{16}{\left(3 \right)}}{65537} + \frac{\cos^{14}{\left(3 \right)}}{16385} + \frac{\cos^{12}{\left(3 \right)}}{4097} + \frac{\cos^{10}{\left(3 \right)}}{1025} + \frac{\cos^{8}{\left(3 \right)}}{257} + \frac{\cos^{6}{\left(3 \right)}}{65} + \frac{\cos^{4}{\left(3 \right)}}{17} + \frac{\cos^{2}{\left(3 \right)}}{5} + \frac{1}{2}$$
1/2 + cos(3)/3 + cos(3)^2/5 + cos(3)^3/9 + cos(3)^4/17 + cos(3)^5/33 + cos(3)^6/65 + cos(3)^7/129 + cos(3)^8/257 + cos(3)^9/513 + cos(3)^10/1025 + cos(3)^11/2049 + cos(3)^12/4097 + cos(3)^13/8193 + cos(3)^14/16385 + cos(3)^15/32769 + cos(3)^16/65537 + cos(3)^17/131073 + cos(3)^18/262145 + cos(3)^19/524289 + cos(3)^20/1048577