■初等関数研究所■

[0055 １３２人目の素数さん 2019/02/19(火) 15:02:27.02 ID:IDFPWNBX]

(2n^2+10n+3+((-1)^n)(2n-3))/16

{{1, 1}, {2, 2}, {3, 3}, {4, 5}, {5, 6}, {6, 9}, {7, 10}, {8, 14}, {9, 15}, {10, 20}}