170048394domain: NAppears in sequencesG.f.: A(x,y) = (1-y) * Sum_{n>=0} y^n * (1 + x*(1-y)^2)^(n^2).at n=72A303920G.f.: A(x,y) = (1-y) * Sum_{n>=0} y^n * (1 + x*(1-y)^2)^(n^2).at n=73A303920Main diagonal of triangle A303920: a(n) = A303920(n,n) for n>=0.at n=8A303921