0544132人目の素数さん
2018/04/29(日) 13:40:34.24ID:LZWvDOTXnΣ[k=1,n] s_k (a_k)^2 ≧ M_n (s_n)^3,
とおく。
M_2 = 0.7377393811182 = 2(47-14√7)/27
(a,b) =(√7 -1,4-√7)(3+√7,2+√7)
M_3 = 0.6481616033162
(a,b,c) = (1.38436,1.13916,1)
M_4 = 0.60233351875
(a,b,c,d) = (1.52472,1.25465,1.10139,1)
M_5 = 0.574255
M_6 = 0.5551782
M = 0.444444 = 4/9 (n→∞),