1 (An):1; 4; 9; 16; 25; 36 ......

2(an)*:0； 1; 1; 1; 2; 2; 2; 2; 2 ... for example, am

3 ((An) *) *:1; 4; 9; 16; 25; 36 ... for example, in series (an)*, am

Just press it down in turn.

((a5)*)*=(2)* can't be calculated like this, ((a5)*)* should be the fifth item in series 3, that is, how many items in series 2 are less than 5?