User blog:Nayuta Ito/Ita-Chihaya number

I made something too large for me to understand.

Array is a permutation of numbers or arrays. Array is written like these:

(1,2,3)

((2,3),4,(5,8,(6)))

Capital letters are arrays and small letters are numbers.

(a)=a, it means an array of one number is the same as the number.

$$f(x)=x+1$$ If there is 0 in array,