106000domain: NAppears in sequencesMinimal (positive) solution a(n) of Pell equation b(n)^2 - D(n)*a(n)^2 = +4 with D(n)= A077425(n). The companion sequence is a(n)=A077428(n).at n=17A078355Triangular array: the fission of (p(n,x)) by ((2x+1)^n), where p(n,x)=(x+1)^n.at n=51A193856Mirror of the triangle A193856.at n=48A193857