User blog comment:Wythagoras/Dollar function part 2/@comment-5029411-20130607202808

Here a $ of operator.

0$ of # = #

n$ of # = 0,0...0,0,1

[@]$ of # = 0,0..0,0,1 (@ 0's), let [1] = X+1, [n] = X+n, 0 = X*2, 0]...[0 = X*(n+1), n > X^n+1, [0] > X^X, etc.