来自在线整数百科全书的问候语!http://oeis.org/ Search: id:a317855 Showing 1-1 of 1 %I A317855 %S A317855 3,1,6,1,0,8,8,6,5,3,8,6,5,4,2,8,8,1,3,8,3,0,1,7,2,2,0,2,5,8,8,1,3,2, %T A317855 4,9,1,7,2,6,3,8,2,7,7,4,1,8,8,5,5,6,3,4,1,6,2,7,2,7,8,2,0,7,5,3,7,6, %U A317855 9,7,0,5,9,2,1,9,3,0,4,6,1,1,2,1,9,7,5,7,4,6,8,5,4,9,7,8,4,5,9,3,2,4,2,2,7πn A317855的常数与A122400的渐近相关的常数的小数展开.0%F A317855等于(1+EXP(1/R))*R^ 2,其中R= 0.87070243966363309656830720771929 8213132…方程EXP的根(1/R)/R+(1+EXP(1/R))LambertW(-EXP(-1/R)/R)=0。FindRoot[E^(1/r)/r + (1 + E^(1/r)) * ProductLog[-E^(-1/r)/r] == 0, {r, 3/4}, WorkingPrecision -> 120]; RealDigits[(1 + Exp[1/r])*r^2][[1]] %Y A317855 Cf. A121886, A122399, A122400, A122418, A122419, A122420, A227619, A232192, A243802, A244585, A248798, A317340, A326010. %Y A317855 Cf. A301584, A301585, A301586. %K A317855 nonn,cons %O A317855 1,在AOIS最终用户许可协议下,A317855、VaLavkKoTeVoCeCo、Aug 09、2018π的内容是1个百分点:HTTP:/OEIS.Org/许可证。