User blog comment:Nayuta Ito/Ordinal Ruler/@comment-99.185.0.100-20150807230946/@comment-25601061-20150809234950

A0 = o

An = A(n-1)A(n-1)A(n-1)...A(n-1)A(n-1)A(n-1)

An = $$\omega^n$$