User blog comment:Denis Maksudov/M-notation (new version)/@comment-10262436-20160620212735/@comment-28606698-20160621175727

f_0 (ω)=ω+1f_1 (ω)=f_0^ω (ω)=lim⁡(ω+1,ω+2,..)=ω+ω=ω2f_2 (ω)=f_1^ω (ω)=ω2^ω=ω^2f_3 (ω)=ω^ω=ω↑ωand so on