User blog comment:Boboris02/Boris´s sezration notation/@comment-29014792-20161005162834/@comment-29014792-20161005192425

And // starts at w^2+w3

/// starts at w^2+w4

[]_X starts at w^2*2

(@) starts at w^2*2+1

Double (@) ~ w^2*2+1

(@+1) ~ w^2*2+w

(@+2) ~ w^2*3

(@+3) ~ w^3

(@*2) ~ w^w+1

...

I guess the limit is psi(W_w)