V⁡t∼π-1/2⁢t1/6⁢1+548⁢t-2-15254608⁢t-4+23 978756 63552⁢t-6-7 48989 406258918 13888⁢t-8+14419 83037 343754 28070 66624⁢t-10-⋯,