We're currently editing 3,939 articles.
When I was editing this article, there were 3,939 articles. At least when I decided to make this article.
TN for "thirty-nine."
TN[x]=3939...(x times 39's)...3939 TN[0A]=TN[A] TN[Ax,y]=TN[A,x-1,TN[A,x,y]] TN[Ab,0Y]=TN[A,b-1,39,Y] (the zero must be the leftmost one)
K for brackets.
TN[0KA]=TN[KA] TN[An(1)x]=TN[An-1(1)x,x,...(x times x's)...,x,x] TN[An(x)Kz]=TN[An-1(x-1)z,z,...(z times z's)...z,zKz] TN[An(m)x]=TN[An-1(m-1)x(m-1)x...(x times x's)...x(m-1)x]
I guess it's well defined.
I will name numbers below.
TN[2]=article TN[3]=tri-article TN[4]=tetra-article TN[1,0]=TN[39]=full-article TN[2,0]=di-full-article TN[3,0]=tri-full-article TN[1,0,0]=whole-article TN[1,0,0,0]=fourth-filled-article TN[1(1)39]=great-article TN[2(1)39]=di-great-article TN[3(1)39]=tri-great-article TN[1,0(1)39]=full-great-article TN[2,0(1)39]=di-full-great-article TN[1(1)(1)39]=TN[39,39,...,39,39(1)39]=great-great-article TN[1(1)(1)(1)39]=great-to-the-third-article TN[1(1)(1)(1)(1)39]=great-to-the-fourth-article TN[1(2)39]=super-article TN[1(3)39]=third-super-article TN[39(39)39]=wiki-article