Find the nth number 1,4,9,16,25,36

Find the nth number 1,4,9,16,25,36

They are 1, 2, 3 and 4 respectively
The nth number is n & # 178;

Observation group number: 1 / 4, 3 / 9, 5 / 16, 7 / 25, 9 / 36 They are arranged according to a certain rule, then the nth number of this group of numbers

(2n-1) of (n + 1)

(1/5+2/3)×15＝ (1/4＋2/9)×36＝ 4/7×5/9＋3/7×5/9＝ 7/11
(1/5+2/3)×15＝
(1/4＋2/9)×36＝
4/7×5/9＋3/7×5/9＝
7/11×3/8×4/9＝
5/18×1/4×9/10＝

[2 and 1 / 2 - (7 / 9-11 / 12 + 1 / 6) * 36] / 5

[2 and 1 / 2 - (7 / 9-11 / 12 + 1 / 6) * 36] / 5
=(2.5-7/9×36+11/12×36-1/6×36)÷5
=(2.5-28+33-6)÷5
=1.5÷5
=0.3;